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08-10-2012, 08:56 AM
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#1 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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61 GMC 4x4 1ton build
Hello all.
I thought I would post a few pictures of my project. The backgound is I was wanting a new truck, I have a 06 powerstroke and almost traded it in this spring, but I hate the idea of a payment been 5years without one, and really hate the idea of having to be extra careful not to scratch a new truck. So I decided to build me a truck instead. I will keep the powerstroke and not worry about scratches and have something that no one else around has. Anyway the truck is a 61 GMC 3/4 2wd cab on a 4wd 80 suburban frame with a 4bt cummins diesel, ranger o.d. unit coupled to a muncie 465 4 speed, 205np transfer case, dana 60 front and dana 70 rear. I have taken 5 trucks so far to get to this point. I have a alot of work ahead but here is the begining of the build. The truck will have a dump flat bed when I get finished. Last edited by ky-donzi; 08-10-2012 at 09:06 AM. |
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08-10-2012, 08:58 AM
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#2 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Here are a few of the donor trucks
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08-10-2012, 11:29 AM
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#3 |
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Registered User
Join Date: Oct 2009
Location: Ogden, Utah
Posts: 149
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Re: 61 GMC 4x4 1ton build
very cool build man! hopefully that 4bt will be enough power for you
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1960 short bed fleetside factory 4x4 1960 panel 454 NV4500 Daily driver 1961 Short Bed BBW Fleetside 5.3 th400 swap in process |
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08-10-2012, 11:35 AM
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#4 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Supposedly the 4bt in stock form is very compairable to a chevy 350. It came out of a 10500lb GVWR bread truck that would run 55 mph loaded so thats gota account for something.
With tuning they are suppost to be real power houses, IDK much about them. The only experence I have had was the 1 hr drive home in the "twinkie truck" |
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08-10-2012, 04:26 PM
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#5 | |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 61 GMC 4x4 1ton build
Quote:
I ran a 453 detroit in mine for 18 years. I did sell it and the shipping weight with complete eng and NP 5speed crated on a pallet was 1750 lbs. the frame came up 3 1/2" when I removed it and back down 1/4" when the 283 went in ron |
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08-10-2012, 11:41 AM
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#6 |
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Registered User
Join Date: Jul 2012
Location: SE AK
Posts: 40
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Re: 61 GMC 4x4 1ton build
You can get ALOT out of that Cummins.......most built for the highway are de-tuned for emissions and so they don't tear up medium duty drivetrains. I don't have personal experience with the
4BT engine, but am very confident that there is plenty of power there waiting to be tapped in to - AWESOME build......good luck!! TC 
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My other Chevy Truck is a 2004 2500HD 4X4 with an 8.1L (496cid) and Allison T1000 (5spd Auto) 1966 C20 DD Build 
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08-10-2012, 12:12 PM
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#7 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
The 4bt that I have is 120hp water/air intercooler. In stock form I believe 300ish ft/lb torque at about 1800rpm. In the bread truck it actually had quicker acceleration than my 06' superduty. I would run off and leave the guy who drove my truck home, until I hit the governer... then he would blow by me.. governed at 2200rpm I believe
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08-10-2012, 02:25 PM
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#8 |
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Registered User
Join Date: Dec 2011
Location: Donaldsonville, La.
Posts: 1,024
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Re: 61 GMC 4x4 1ton build
Will be watching your build, I wanna do the 4bt for a daily driver in either a 66 or a 63, I have both.
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08-10-2012, 02:28 PM
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#9 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Jeff La
Check out 4btswap web site alot of info there. Also there is a member here that has done one. If you have a 2wd it will be alot eaiser I believe, less items to work around. I will keep you posted on progress. |
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08-10-2012, 02:43 PM
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#10 |
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Registered User
Join Date: Apr 2008
Location: Md
Posts: 2,485
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Re: 61 GMC 4x4 1ton build
Very cool Rig, This Truck will outlast out pull most any truck built today.. I see some other hidden treasures around your shop..(John Prine) Nice Work. I hope this truck is not going to be called Twinkie.
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08-10-2012, 02:50 PM
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#11 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Ive got some interesting things in my shop,, eclectic items.... I havent decided on a name for the truck, but can a sure you "twinkie truck" will not be one of them...
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08-10-2012, 04:16 PM
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#12 |
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Registered User
 Join Date: Mar 2011
Location: Co
Posts: 412
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Re: 61 GMC 4x4 1ton build
Looks like you started with a nice truck.
Did you keep the hyd. motor mounts? what gears are you running? I would like to see more pictures of the engine install if you have them.
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63 k20 with cummins 4bt, owned sence 1982 |
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08-10-2012, 04:44 PM
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#13 |
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Registered User
Join Date: Mar 2011
Location: Co
Posts: 412
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Re: 61 GMC 4x4 1ton build
I never put a 4bt on a scales, but the 305 v6 I pulled out of my 4x4 frame wieghed more.
front springs compressed more with the v6. The 4bt is about 720lb I'm told.
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63 k20 with cummins 4bt, owned sence 1982 |
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08-10-2012, 05:00 PM
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#14 | |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 61 GMC 4x4 1ton build
Quote:
hp-displacement close. 453 not turbo'd 122 hp-212 cu" ron |
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08-10-2012, 06:49 PM
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#15 |
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Registered User
 
Join Date: Sep 2011
Location: FarEastern WVa
Posts: 1,691
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Re: 61 GMC 4x4 1ton build
That is gonna be a killer truck, welcome to the board!
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Past Master Triluminar Lodge #117 GL of WVa My 1963 4x4 Suburban build; http://67-72chevytrucks.com/vboard/s...d.php?t=531274 My Gallery, now with pics of my 1966 C30 motorhome. http://67-72chevytrucks.com/gallery/...&ppuser=103447 |
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08-10-2012, 10:28 PM
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#16 |
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Senior Member
Join Date: Nov 2007
Location: New Blaine, Arkansas
Posts: 751
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Re: 61 GMC 4x4 1ton build
Can't waite for more!
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08-11-2012, 12:26 PM
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#17 |
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Just here to tinker
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: 61 GMC 4x4 1ton build
Awesome looking build. Can't wait to see more pics! Anyone know what kind of mileage the 4bt's get?
__________________
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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08-11-2012, 12:50 PM
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#18 |
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Registered User
Join Date: Mar 2011
Location: Co
Posts: 412
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Re: 61 GMC 4x4 1ton build
24 in a 3/4 ton 63 K20 w/4.10 gears and .73 overdrive.
28 in a 83 ford full size bronco w/3.54 gears and ZF trans. This is combined mpg
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63 k20 with cummins 4bt, owned sence 1982 |
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08-11-2012, 07:14 PM
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#19 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
diesel dude
I am using the Hyd mounts that came from the bread truck. I made my own frame mounts and mounted the engine with those at the front, under the ranger od box Im adding a crossmember and a th400 mount, then I will also use the factory mount between the transmission and transfer case. This should help reduce the stress on the bellhousing adapter. as far as gears go the Dana's have 3.73 in them. I have a few more pics I will post soon. AND YES I found a really good cab. Very little work in that dept needed, I was able auto sell the perfect bed, and 5 lug converted frame and recoup most of my money. So far I'm in very good shape $ wise. Most of my purchases were supplemented by scraping the unneeded parts of donor vehicles. Stay tuned and I will get some motor mount pics up this week Posted via Mobile Device |
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08-11-2012, 10:46 PM
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#20 | |
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Registered User
Join Date: Dec 2011
Location: Donaldsonville, La.
Posts: 1,024
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Re: 61 GMC 4x4 1ton build
Quote:
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08-12-2012, 12:35 AM
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#21 |
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Registered User
Join Date: Jun 2012
Location: Selkirk Ontario Canada
Posts: 1,141
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Re: 61 GMC 4x4 1ton build
this looks like it will be a cool build
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My 63 GMC Panel Slow Build http://67-72chevytrucks.com/vboard/s...=1#post5457281 63 
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08-13-2012, 09:45 AM
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#22 |
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Registered User
Join Date: Mar 2011
Location: Co
Posts: 412
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Re: 61 GMC 4x4 1ton build
ky-donzi
I would use a hyd. clutch if possible, there is a lot of vibrations transferred through the rods and linkage to the dash of the mechanical set up. I wish I had used hyd motor mounts on mine, its hard to take down and rebuild after you start driving it.
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63 k20 with cummins 4bt, owned sence 1982 |
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08-13-2012, 10:39 AM
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#23 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Diesel dude
Yes I know, that has always been my down fall... once it drives I slow down working on it..... I have a 85 chevy dual pattern bellhousing that uses an external hyd clutch. Im going to get with captainfab for the hydroboost/hyd clutch mount bracket that he sells. My focus now is mounting the cab to the frame. I have it sitting there and believe that it will be easiest just to torch out all the rivets and remove the orginal suburban cab mounts. I think Im just going to fab some of my own cab mounts and go that route. The cab lines up with the 80 suburban mounts from front to back, its just the suburban mounts are narrower. It will be easiest and not look junky to just remove the exisiting frame mounts, fab new ones that match the holes in the 61 cab, and attach them in the holes left in the frame where the suburban mounts were. |
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08-13-2012, 10:57 AM
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#24 |
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Registered User
Join Date: Mar 2011
Location: Co
Posts: 412
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Re: 61 GMC 4x4 1ton build
That will be the best way to do the mounts, it will look like some one cares about what is built.
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63 k20 with cummins 4bt, owned sence 1982 |
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08-20-2012, 03:52 PM
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#25 |
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Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 313
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Re: 61 GMC 4x4 1ton build
Thought i would post some progress that i have made. I have decided torch off the frame mounts that were on the 80 suburban frame. I made my own new frame mounts (frame stands). I also incorperated body bushing from a later model chevy 76-80 for a better mount (read more cushion) these will directly bolt in place of the riveted frame stands.
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