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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2019 Posts: 238 'Bolter | | 'Bolter Joined: Oct 2019 Posts: 238 | Has anyone installed a big block Chevy in a 40? If so I’m looking for pics and details regarding how the fit is I know it’s gotta be tight. Also what motor mounts were used. I scored a running driving 454 and 4l80E complete and running the whole truck for a donor so I have all the wiring harness ECM/TCM. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Putting something in because it was cheap or free often ends up being near impossible, or needing a lot of compromises, or never getting done, especially since is known to be difficult.
Good luck.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Mar 2007 Posts: 3,391 Crusty Old Sarge | | Crusty Old Sarge Joined: Mar 2007 Posts: 3,391 | Tony292, check out 32vsnake in the project forum, he's building a 40' with a big block. He has it figured out pretty nice, the engine and trans went in smooth, it looks tight but that is to be expected.
~ Craig 1958 Viking 4400"The Book of Thor"Read the story in the DITY1960 Chevrolet C10"A Family Heirloom"Follow the story in the DITY Gallery'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting) If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane | | | | | Joined: Apr 2021 Posts: 427 'Bolter | | 'Bolter Joined: Apr 2021 Posts: 427 | As Tuts59 mentioned, I'm currently in the process of putting a 396 BBC in my 40 1/2ton. I wanted to keep the factory steering box, front axle and as much of the original firewall as possible...it's still a farm truck after all Was forced into making two " clearance pockets" on each side of the firewall to clear the valve covers (I'm running tall VC's to clear my roller rockers) and that's really the only modification that was required to the body. I'm also running patriot fender well headers designed for a 55-57 Chevy sedan as there is no room between the frame, engine and steering box on the drivers side. I do have to clearance the inner fender lip slightly as the passenger side header is rubbing...but that's on me for not dropping the motor mount another half inch or so. As for motor mounts, I went with Chassis Engineering Engine Motor Mount Kit for 1940-54 SBC Chevy Truck CP-1160. I didn't get the bolt in ones though, ended up using the one's for a mustang 2 based suspension and modifying those to work with steel plates that are welded and bolted to the frame. All in all it's gone together pretty well I have a few pics and some explanations about what I was thinking in the build thread. https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/1420132/1.htmlIf you have anymore questions , let me know and I'll try to assist if I can. Cheers
Last edited by 32vsnake; 10/27/2021 2:54 AM.
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