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#451 |
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Join Date: Nov 2014
Location: somewhere, PA
Posts: 1,071
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Re: Yet another GMC build
in width or distance from the body mount?
if distance from the body mount, you can probably find that much just by loosening everything and biasing the cab to the chassis, the fenders to the core support, core to frame, etc. if width, can you just add a plate to the core support? |
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#452 | |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Quote:
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56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167 |
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#453 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Could also try to tilt the core and trim the back of the splash pan to fit. Will investigate more
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#454 |
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Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,644
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Re: Yet another GMC build
What's that front crossmember in the old frame out of? That thing looks huge.
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#455 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
That is a corvette factory crossmember. It’s made out of stamped sheet metal and can flex under load. C4 suspension in a 55-59 usually puts the engine much farther forward and higher than the stock corvette. I had trouble keeping the alignment correct because all the weight was shifting things around. Shouldn’t be a problem with the new Flatout engineering crossmember.
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#456 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,026
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Re: Yet another GMC build
look in here for frame dimension drawings. the 58-59 frames are longer out front and the rad support brackets are in a different location. it's all ahead of the spring mounts so from there back they are the same.
https://www.trifive.com/d1/55-59Assy.pdf |
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#457 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: Yet another GMC build
frame dimension drawings start in section 2 sheet 24. you are looking for sheet 33. a lot of the dimensions are given off the imaginary face of the cab line (firewall) so you may have to look closely to find the place where the rad support brackets are measured from. kinda looks like the center line of a cross member at the rear of the cab and takes a couple of dimensions to add up for the total dimension.
anyway, you'll figure it out. |
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#458 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
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Re: Yet another GMC build
I ended up knocking out the rivets and moving the brackets back about 1”. Since it was kind of hard to access to drill new holes I just welded the brackets to the frame. Cab is bolted solid to the frame now. Got in the gas tank, battery drop box, and cleaned and painted the Dana 44 so should be able to start reinstalling suspension.
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56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167 Last edited by OKGMC4; 07-16-2021 at 01:39 PM. |
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#459 |
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Location: Doodah Kansas
Posts: 7,773
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Re: Yet another GMC build
good solution!
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the mass of men live lives of quiet desperation if there is a problem, I can have it. new project WAYNE http://67-72chevytrucks.com/vboard/s...d.php?t=844393 |
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#460 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
So far so good. Still figuring out the firewall. Will either be homemade or a wheelbarrow. Deepest “big block” firewall is 4” recessed and I need 6”. Will have to move the gas pedal over, and the brake pedal. Vintage air unit may not fit right anymore. Plenty of obstacles that I’m sure have grand solutions. Just need to stare at it long enough and drink more coffee.
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#461 |
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Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Re: Yet another GMC build
That looks like a lot of engine set back
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53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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#462 | |
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Join Date: Jan 2013
Location: roseville
Posts: 823
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Re: Yet another GMC build
Quote:
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My Current Trucks: 1958 Apache BBW 4.8LS/4l60 "Lucky" Built By Me 1958 GMC BBW LS1/4l60 "The Kraken" Built By Delmo |
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#463 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Yep. That's about where an LT1 was placed in the original C4 and it should restore the balance for better handling. I should be able to put the intercooler where the radiator was, and make a new mount for the radiator just after that. If you don't want to cut the firewall you have to get the engine over the rack with the rack between the balancer and oil pan.
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#464 |
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Join Date: Nov 2014
Location: somewhere, PA
Posts: 1,071
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Re: Yet another GMC build
holy mid-engine batman!
the Cummins needed a 6" doghouse too, but wasn't that wide. while a wheelbarrow would be sweet, i'd be more worried about keeping the doghouse as narrow as possible. |
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#465 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,026
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Re: Yet another GMC build
I recommend to sit in the cab area and place your feet where the pedals would be. Nothing worse than a cramped accel pedal on a long ride and you need room for your foot to access the brake pedal easily. Try to make the firewall recess as narrow as possible. Maybe even a removable cover like a van has. Also think of shape if you plan on upholstering it. If a wheelbarrow is the shape you like but too wide, you could split it and seam down the middle. If going with sheet metal from scratch, mock it up with posterboard or even wood veneer and tape.
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#466 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Im seeing what you guys are saying. The width is more of an issue on this narrow cab than it would be on a c10. To get this to work I’ll have to relocate the gas pedal and therefore the brake pedal. It interferes with the brake booster bracket and might as well scoot the column and gauges. I have 4” of room to move the seat over, too. And new carpet. Plus my vintage air won’t fit but it looks like an Old Air Hurricane will. Im just being stubborn about making it work. Truck was a great driver but could never turn corners despite the c4 suspension.
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#467 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Inspiration.
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#468 |
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Location: Eagle, ID
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Re: Yet another GMC build
What truck is at the bottom, with the interior shot?
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#469 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
The single turbo engine and the interior go with this truck. A little more utilitarian than I d prefer but still pretty awesome.
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#470 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Wheelbarrow seems to work. I like that it’s curved. Anything I could’ve made would be all sharp angles. Going to recycle the hump from the firewall as the transmission bump. Then on to relocation of pretty much everything else in the cab.
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#471 |
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Join Date: Jun 2005
Location: California
Posts: 521
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Re: Yet another GMC build
Looks nice. Love the set back
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#472 |
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Location: Eagle, ID
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Re: Yet another GMC build
Yeah, it is. I like the roll cage in it though. It appears to be tucked out of the way nicely and he probably has four point belts attached to it. Thanks for the photo.
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#473 |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
The gas pedal is pretty much where the brake used to be. I had to move the booster bracket over a couple inches. By grinding the welds on the brake pedal arm, I can now move it to the other side of the swing arm shaft. I put a seat back in and the gas pedal feels comfortable where it’s at but I think the brake pedal is going to be a left foot operation. Driving with both feet doesn’t really bother me any more than using a clutch. I’m just going to leave the column and seat locations alone.
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#474 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: Yet another GMC build
That would drive me crazy, but, to each their own.
Is there room for your left foot anywhere when not being used for the brakes? Have you checked local laws for foot and pedal clearance laws, if any exist? Wouldn't wanna find out AFTER doing all that work. |
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#475 | |
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,226
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Re: Yet another GMC build
Quote:
Plenty of room. And I can actually hit the brake with the right foot but it feels a little like trying to cross my legs. Might just be me though. My wife sat in it and said it’s fine, but her feet are small. A friend had me help rebuild his triumph spitfire and I can’t even drive the thing unless I take my size 12 shoes off. The stock pedals are so small and cramped my big Ronald McDonald feet hit two pedals at once. Makes braking and shifting super fun. I guess British people have little stompers.
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