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05-27-2024, 08:49 PM | #1 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Picked up a 73 C20, low original milea
Well hello all!
I haven’t been on here much lately because I really haven’t been tinkering with my trucks lately….But! This weekend I picked up a 73 C20 with only 31k original miles! She lived on a farm in the middle of Illinois her whole life. I hopped in and drove it 240 miles home without a single issue. It has a 350/SM465. Not sure gears yet. I think 3:73. Here are some pics after a quick wash and before I really started cleaning!
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-27-2024, 08:52 PM | #2 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
And here are some after I pulled everything out of interior and cleaned up 50 years of dirt. I brushed up loose rust and put corroseal on to stop it from spreading. I also scrubbed all the upholstery and the floor mat.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-27-2024, 08:55 PM | #3 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
Then I thought I would do a little buffing and get the front bumper looking a little better.
The plans are just to drive it and leave as original as possible. It isn’t perfect, so I can still use it as a truck and not feel bad about it.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-27-2024, 11:49 PM | #4 |
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Join Date: Jan 2017
Location: Valley, NE.
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Re: Picked up a 73 C20, low original milea
Looks great! Enjoy!!
Greg
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________________ 1970 GMC Sierra Grande, 2500 133" wb, 402, 4spd. 2007 GMC 3500 SRW 4x4, Crew cab, Duramax/Allison. (Sold} 1987 Chevy Suburban 2500, Silverado, 2wd, 454, t-400 2023 Chevy Silverado LT 3500, crew cab, longbox, 4x4 Z-71 Duramax. |
05-28-2024, 10:59 AM | #5 |
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Join Date: Feb 2011
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Re: Picked up a 73 C20, low original milea
Nice find and the bumper turned out great! I like that green as well, Congratulations on saving another one Cort!
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MusicMan70 1961 GMC Suburban |
05-28-2024, 12:45 PM | #6 |
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Location: Motor City
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Re: Picked up a 73 C20, low original milea
Noice!
If you find the SPID label I can probably tell you what rear axle ratio it has. K 3.73 is standard; 4.10 and 4.56 optional: https://www.gm.com/content/dam/compa...olet-Truck.pdf
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
05-28-2024, 01:01 PM | #7 |
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Re: Picked up a 73 C20, low original milea
outstanding!
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1987 V20 farm-hand rescue 1998 C2500 lot-rot rescue |
05-28-2024, 06:23 PM | #8 | |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
Quote:
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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05-28-2024, 06:26 PM | #9 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
Here are some pics of the engine compartment. Only things changed so far is radiator and HEI. I need to get some valve cover gaskets on her before I drive too much more.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-28-2024, 10:19 PM | #10 |
67-72 parts collector,…
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,700
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Re: Picked up a 73 C20, low original milea
Wow. Such a killer truck.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
05-28-2024, 10:35 PM | #11 |
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Location: Ohio
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Re: Picked up a 73 C20, low original milea
Wow! Thats nice. I would have sworn that was a Pearl Gray interior, but the spid says Slate Green.
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FB Page for my Seats Belts https://www.facebook.com/73-87-Chevy...9439407476735/ Restoring Seatbelts: http://67-72chevytrucks.com/vboard/s...d.php?t=809750 SOLD My 86 Build:http://67-72chevytrucks.com/vboard/s...d.php?t=654972 Past Restored Bench Seats:http://67-72chevytrucks.com/vboard/s...d.php?t=715398 PayPal link to pay for your items: https://www.paypal.me/TKCR |
05-28-2024, 10:51 PM | #12 |
Born Psycho
Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,938
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Re: Picked up a 73 C20, low original milea
nice score, congrats.
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
05-28-2024, 11:46 PM | #13 |
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Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,611
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Re: Picked up a 73 C20, low original milea
That MFG date of May 97 on the valve cover is interesting. Whatever the story is on the motor, nice looking truck.
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05-29-2024, 06:30 AM | #14 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
It actually says May 1973, you just can’t really tell in the picture. And thanks!
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-29-2024, 07:18 AM | #15 |
Registered User
Join Date: Feb 2017
Location: Ontario Canada
Posts: 136
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Re: Picked up a 73 C20, low original milea
That’s a great truck. Every now and again a nice farm 3/4 ton turns up. You got lucky.
What rear axle does it have? Semi or full float? If you’ve got a full float 3.73 that’s pretty nice with the 465. I’ve got the same engine/trans combo is you (just coming up on 50,000 miles this summer) but with a 4.10 in the back. It turns a lot of rpm on the highway. |
05-29-2024, 08:29 AM | #16 | |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
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Re: Picked up a 73 C20, low original milea
Quote:
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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05-29-2024, 11:26 AM | #17 | |
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Join Date: Aug 2012
Location: Oklahoma City, OK
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Re: Picked up a 73 C20, low original milea
Quote:
If that is the OEM exhaust system, make sure it isn't one of the double wall exhaust pipe setups on the y-pipe. If the inner wall collapses, all sorts of bad things happen. |
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05-29-2024, 11:28 AM | #18 | |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
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Re: Picked up a 73 C20, low original milea
Quote:
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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05-29-2024, 08:07 PM | #19 |
Senior Member
Join Date: Mar 2013
Location: Ann Arbor, MI
Posts: 1,029
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Re: Picked up a 73 C20, low original milea
Always liked that color and ‘73’s are just cool. Nice truck!
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05-29-2024, 10:32 PM | #20 | |
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Location: Ontario Canada
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Re: Picked up a 73 C20, low original milea
Quote:
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05-29-2024, 10:34 PM | #21 |
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Join Date: Feb 2017
Location: Ontario Canada
Posts: 136
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Re: Picked up a 73 C20, low original milea
Mine had the build sheet under the passenger side of the seat - tucked in the springs. My rear axle code is GT5, which is a full float 4.10
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05-29-2024, 11:27 PM | #22 |
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Location: Oklahoma City, OK
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Re: Picked up a 73 C20, low original milea
IF it has a double wall pipe, the inner wall can collapse and block off the exhaust flow. Symptoms are crappy performance and carbs that keep going bad. My dad bought what is now my 75 in 78. Its performance sucked. It had problems going faster then about 60(during the 55 speed limit era). Plus the carb kept going bad and flooding out. The thing looked like a diesel going down the road. When the thermostat stuck shut, the head gasket cracked. Turned out to be a good thing. While the heads were off, I looked down the exhaust pipes and noticed that both were blocked off even though the outside looked normal. Took it to an exhaust shop and they said they had seen several of the newer GM trucks with that problem. Swapped to a dual exhaust and suddenly it ran much better. 90+ with more left(younger and stupider).
Don't know if the double wall Y-pipe was a converter thing to keep the exhaust hotter or a noise thing. Mine never had cats being a HD version but I can see GM using the same Y-pipe on both versions. |
05-30-2024, 07:47 AM | #23 |
Just here to tinker
Join Date: Jun 2008
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Re: Picked up a 73 C20, low original milea
Thanks!
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
05-30-2024, 09:40 AM | #24 | |
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Re: Picked up a 73 C20, low original milea
Quote:
No tellin' what's in there now. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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05-30-2024, 10:54 AM | #25 |
Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: Picked up a 73 C20, low original milea
Thanks Keith! So far as I’ve found, she’s basically 100% original. Still has the shocks on it that has the spirals in the metal. So I’m thinking still has the 3:73 as well.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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