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#1 |
Registered User
Join Date: Dec 2010
Location: livingston co.mi
Posts: 2,478
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Re: Whats your impression of a 5.3L LS motor in these trucks?
[QUOTE=CC69Rat;5280451]Where are you finding these cheap (low priced) LS motors? Everything I find is $3k range and it has a boatload of miles on it. Maybe I'm just not looking in the right place.
x2 on that even on the 5.3 around here anyway
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California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project |
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#2 |
Senior Member
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Location: Chattanooga TN
Posts: 6,224
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Maybe swap the rear gear and see if that helps (?) If mine becomes a problem i will be swapping too.
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#3 |
Senior Member
Join Date: Aug 2005
Location: tulsa OK
Posts: 3,070
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Re: Whats your impression of a 5.3L LS motor in these trucks?
5.3 is the way to go......both are stock 5.3s with a 4l60e trans, only thing both have are cold air intakes, and a tune, the blue white one has headers too....plenty of power, and had way better drivability then a 350/350 combo (click on pics to watch video)
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Twin Turbo 64 nova project http://67-72chevytrucks.com/vboard/s...d.php?t=669163 68 camaro LS2/T56 vs. 06 GTO build http://67-72chevytrucks.com/vboard/s...d.php?t=516310 project incredible hulk build http://67-72chevytrucks.com/vboard/s...d.php?t=269754 project big red build http://67-72chevytrucks.com/vboard/s...d.php?t=342165 project "blue ray" build http://67-72chevytrucks.com/vboard/s...d.php?t=405465 |
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#4 |
C-10 Club Member
Join Date: Mar 2010
Location: Corona,CA
Posts: 1,001
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Re: Whats your impression of a 5.3L LS motor in these trucks?
All of the LSX based motors are great.....
Like mentioned if you can find a decent priced 5.3/4l60 I would go that route with very little thought. shoot even a 4.8 would be fun for a daily driver. You should be able to find a 5.3/tranny and wiring harness/computer for less than 3K 6.0 became more popular/pricey and alot of people use those as replacements for there 5.3 while trying to go faster in there trucks/cars. In my experience the 4.8,5.3 and 6.0 only differ about 15-20hp each as the cubes increase. Tq is the biggest difference between the 3. My 03 regular cab 5.3 made 290 to the wheels with exhaust,intake,electric fan and programming. It ran pretty hard for a semi stock truck 14.3 @ 98 If you have a good running SBC I personally think its a waste of $$$ to swap out for a newer motor.If I had to buy a motor I would go with a modern FI set up.
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1969 Short Fleet 350/SM465 4.5/6.5 ECE drop 20" Raceline Wheels 1998 2dr Tahoe 5/7 drop 20"/22" Coys-sold Build thread...http://67-72chevytrucks.com/vboard/s...d.php?t=401910 |
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#5 | |
Your UncleBen
![]() Join Date: Dec 2002
Location: Indian Trail, NC
Posts: 590
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
I hear what you are saying but I am lookin at the super driveability of the new fuel injected engines. I am seriously gonna be driving mine every day rain or shine hot or cold so I want it to be ready and willing. But I also want to have something that has some power and guts to it too! And I think a LSX engine would fit the ticket perfectly. I will sell my old school 327 SBC and 3 speed on the tree, driveshaft and whatever else I have to move on the boards to hopefully help someone else out with there more stock type build. lata CHRIS
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68 C10 shortbed -- Street/Strip ![]() |
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#6 | |
Registered User
Join Date: Aug 2006
Location: Georgia
Posts: 850
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Re: Whats your impression of a 5.3L LS motor in these trucks?
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1963 Chevrolet C10 Short Step 1968 Chevrolet C10 Short Step |
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#7 |
Registered User
Join Date: Jun 2009
Location: CENTRAL,NJ
Posts: 586
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Re: Whats your impression of a 5.3L LS motor in these trucks?
My son has a 2011 Silverado with the 6.2 and six speed auto, it's just an awsesome truck. He gets 20 mpg if he stays at 65 mph. It would be hard to imagine the old style 350's knocking out mileage like that in such a heavy 4x4! Plus it will run the 1/4 in 14.6 !
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#8 | |
Your UncleBen
![]() Join Date: Dec 2002
Location: Indian Trail, NC
Posts: 590
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
I was hard headed for a long time just saying I wanted a "simple" carb'd motor and all that and I totally understand that. But I am really leaning towards the newer small blocks because of that great driveability and power potential out of a basically stock engine. My basic plan was (before considering the 5.3L again) was to get a LQ4 or LQ9 6.0L, swap in a cam (for some good sounds and power), add some Camaro LS1 headers (cheap) , add a CAI and go from there. Cant argue with 400+ hp from just a cam swap and tune. I dont have to deal with flat tappets killing my cam because the oils these days dont have the zinc like they need. I mean it goes on and on the reasons for me IMO. Either way you cannot go wrong. New or old the SBC is the best engine ever made. You cannot argue with torque! Something ford guys would never know about! LOL ![]() lata CHRIS
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68 C10 shortbed -- Street/Strip ![]() |
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#9 |
Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Nice! what were the dyno results?
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ![]() 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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#10 |
Senior Member
Join Date: Aug 2005
Location: tulsa OK
Posts: 3,070
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Re: Whats your impression of a 5.3L LS motor in these trucks?
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Twin Turbo 64 nova project http://67-72chevytrucks.com/vboard/s...d.php?t=669163 68 camaro LS2/T56 vs. 06 GTO build http://67-72chevytrucks.com/vboard/s...d.php?t=516310 project incredible hulk build http://67-72chevytrucks.com/vboard/s...d.php?t=269754 project big red build http://67-72chevytrucks.com/vboard/s...d.php?t=342165 project "blue ray" build http://67-72chevytrucks.com/vboard/s...d.php?t=405465 |
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#11 |
Registered User
Join Date: Jan 2007
Location: Sylvania, Alabama
Posts: 288
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Re: Whats your impression of a 5.3L LS motor in these trucks?
I have my truck right now took apart and i'm going to do the 5.3 swap with 4l60 trans,, from what i see if u want gas mileage is go with a high gear rear end,, try to kep the rpm's down as much as possible... but with mine i'm going with carb and msd box and harness,, its about same money as going efi to me... i'm going to make a build sheet as soon as i can ,, i'm slow doing things....
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72 swb pickup http://i124.photobucket.com/albums/p...k/100_0958.jpg 1967 chevelle ss 1966 mustang getting a l33 ls motor 1969 chevy dump truck 1989 mustang 6.0 ls best time of 1.29 at 5.91 https://www.youtube.com/watch?v=JtbooZoGZmQ |
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#12 |
Registered User
Join Date: Jan 2007
Location: Central Coast California
Posts: 1,029
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Cole's on the money. All three of my trucks needed motors and the LSx's are what I chose. Driveability, reliability, FI, mpg's and coolness were big factors. All three of my engine/tranny combos were had for less than $2k...closer to $1.5k on average.
After you do one...the next ones are easier. I had a 5.3/4l60e in a '04 Avalanche. It pulled a heavily loaded flatbed with a '51 pickup on it...adequately. Not impressively, but it got the job done. I can't wait to see what it does in the '72 2wd I'm building. ... I hope to turn the '72 into a daily driver and sell my 2003 import.
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold ![]() 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold ![]() 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! ![]() 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold ![]() ![]() ![]() 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70!!! (Sold) ![]() 2003 K2500HD 8.1/Allison1000/NP263 ![]() |
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#13 | |
Registered User
Join Date: Aug 2011
Location: Atlanta, GA
Posts: 1,523
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J/K Posted via Mobile Device
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Best Regards, Leon M. Instagram: @TheDirtyDianah
Bagged | 6.0L LS | T-56 (6-Speed Manual) | Turbo Burnout/Rolling Video: Chevy C10 Stepside 6.0L LSx & 6-Speed Manual |
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#14 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,992
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Power and milage aren't mutually exclusive.The better the power means a more efficient engine(generally).It's using that power(heavy right foot) that makes the milage drop.The 5.3 may not do any better than the 6.0 as far as milage when driven the sams.The 6 cyl in these trucks seldom gets much if any better milage than the 350 and even some BB.The EFI engines will have better driveability and should do better on the hiway than a carbed engine,but the 6.0 may have better milage heavily loaded or towing than the 5.3.There are just a lot of variables,the biggest being how you drive.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#15 | |
Your UncleBen
![]() Join Date: Dec 2002
Location: Indian Trail, NC
Posts: 590
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
lata CHRIS
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68 C10 shortbed -- Street/Strip ![]() |
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#16 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: Whats your impression of a 5.3L LS motor in these trucks?
I'm still not convinced on the "new" motors either i just don't see it my carb. vehicles as just as driveable as my fuel injection truck to me and i just can't get past the horrible looks of the newer motors vs. the old ones. One big deal for me is all the extra stuff that is with the new ones all the wiring etc. and harder and more $$$$ to fix. just my op.
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Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
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#17 |
70+ ( Old Skool Club )
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Location: Saskatoon, Saskatchewan ,Canada
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Re: Whats your impression of a 5.3L LS motor in these trucks?
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#18 | |
Senior Member
Join Date: Aug 2005
Location: tulsa OK
Posts: 3,070
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
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Twin Turbo 64 nova project http://67-72chevytrucks.com/vboard/s...d.php?t=669163 68 camaro LS2/T56 vs. 06 GTO build http://67-72chevytrucks.com/vboard/s...d.php?t=516310 project incredible hulk build http://67-72chevytrucks.com/vboard/s...d.php?t=269754 project big red build http://67-72chevytrucks.com/vboard/s...d.php?t=342165 project "blue ray" build http://67-72chevytrucks.com/vboard/s...d.php?t=405465 |
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#19 |
Registered User
Join Date: Nov 2007
Location: Central OK
Posts: 396
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Ain't nothing like some plastic covers to really make that engine pop! Looks good like a Hyndai engine.
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#20 | ||
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
Quote:
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Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
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#21 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Whats your impression of a 5.3L LS motor in these trucks?
I love the 5.3 in my 2000 Z71 ex cab 4x4. I average 14mpg with it and it will easily hit 18mpg on the highway.
I put a 700r behind a rebuilt 350 in my 67 C10. I average around 12mpg and if I keep my foot out of it, I've hit 16mpg on the highway. By the time I blew money on the rebuilt engine and 700r I could have easily had an lsx/4l60 for probably less than what I spent. I would love to put a 5.3 in my 67, but I don't want to "spend money again" on the same thing. Also, don't forget, YES these trucks do weigh A LOT LESS than the new trucks the ls engines are in, however, the 67-72 trucks have aerodynamics like a brick! Believe it or not, GM actually spent a lot of time and money making the GMT800s and 900s as aerodynamic as possible.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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#22 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: Whats your impression of a 5.3L LS motor in these trucks?
I'm really torn with this type of conversion.Not against it,see the value in it yet not crazy about doing it either. What I like about these trucks is the way they were built. They are modern enough for daily driving even today,only gas costs have gotten crazy. You can fix them yourself with no special tools vs paying $75-100 an hour for a "tech". It's great to have more power than you'll ever need and still get great mileage,but I like knowing I can go anywhere I want in my 40 year old truck and no matter what happens I can fix it enough to get back home. I guess I'd like to have one of each...an old school reliable truck that is a s simple as it gets and a high-tech modern computerized old truck that I hope I never have issues with.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#23 | |
Senior Member
![]() Join Date: Jan 2009
Location: Austin, TX
Posts: 1,079
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
i agree...... but for slightly different reasons... I work at a mechanics shop and we work on late model stuff. Most of it is really not too bad once you get to know it........ BUT.... There is just alot of fun in driving around with old school technology..... being able to fix almost everything on the truck with two screwdrivers, a set of wrenches, baling wire and duct tape if you have to. sure the mileage isn't that great.... but so what... I used to be all for putting modern technology in a classic vehicle.... but not so much any more.... there is something to be said for the old school stuff.... fun you just can't get with modern stuff...
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-- Josh Instagram: @americanmusc1e OLD SKOOL-- 1970 C10. 454/Th400/3.07 posi Build Thread FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread 1999 4wd OBS Tahoe - daily. DM me if you can't see photos i posted |
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#24 |
Registered User
Join Date: Apr 2004
Location: Las Vegas, NV
Posts: 2,189
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Re: Whats your impression of a 5.3L LS motor in these trucks?
I'm looking hard at doing this very swap. I am pulling the 496 BBC from my truck as 6 mpg doesnt seem all that fun (not to mention way too much power than I need unless I get back into track weekends). Comparing the costs of buying a Gen II roller crate 350 to the swap and it seems to be more or less of a wash. Of course, prices will go up quickly if I get stuck and have to let someone else finish it for me... If I go with the 350 crate, I can be back on the road in 2 weekends max.
Its a lot to consider, but I am a big believer in future-proofing and gas is only going up. If I can keep costs close to the same, the 5.3 is a no brainer. There are lots of good builds on this site for tips, but it is very daunting to dive into.... Eh. So much to consider.
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RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e |
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#25 | |
C-10 Club Member
Join Date: Mar 2010
Location: Corona,CA
Posts: 1,001
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Re: Whats your impression of a 5.3L LS motor in these trucks?
Quote:
![]() ![]() New motor mounts,tranny mounts drive shaft F-Body oil pan throttle cable/throttle by wire set up New headers and exhaust New fuel tank,lines and pump,return line wire harness or someone with alot of knowledge about the factory harness that can weed through the spiders nest. PCM Tuning software or a custom tune If you are a fabricator/mechanic by trade/hobby I could see this swap happening for less than 4K if you get a good price on the motor/trans and really shop the parts and do all the fab/installl. If your paying a shop you could easily end up in the 7-10K range.(thats alot of gas ![]()
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1969 Short Fleet 350/SM465 4.5/6.5 ECE drop 20" Raceline Wheels 1998 2dr Tahoe 5/7 drop 20"/22" Coys-sold Build thread...http://67-72chevytrucks.com/vboard/s...d.php?t=401910 Last edited by Cole Trickle; 03-29-2012 at 01:39 PM. |
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