Click on image for the lowdown. 
====
| | |
7 members (Donf, King Kielbasa, jmoore, Gdads51, cmayna, 2-Ton, 1 invisible),
85
guests, and
1
robot. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,169 Posts1,057,041 Members48,458 | | Most Online14,466
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!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Mar 2012 Posts: 37 New Guy | | New Guy Joined: Mar 2012 Posts: 37 | I am going to put a sbc in my 1949 Chevrolet 3100. I have mustang II independent front suspension with 10 bolt rear end. Wondering what modifications if any had to be done to the shear metal. Such as firewall, floors, trans tunnel. Thanks in advance | | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | You should be able to do it without any changes to the firewall. | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | It all depends where your engine is situated. You may need to make a small transmission tunnel in the floor but maybe not. You shouldn't have to touch the firewall. | | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | Brown1998, I used this set up, and the mounts, for my 52 Panel and I could not be happier with it. I did not have to alter firewall, or floor board and I used the "big" distributor. http://i140.photobucket.com/albums/r19/LutherParris/52Panel/Engmount.jpg.... I did cut about 1/2" right at the top of the toeboard where the tranny came up to it. However, when I put the tranny cover in place you cannot even see the where I cut it.....and I mean only 1/2 inch just at the top. Some folks modify the original rear cross member and some order one that bolts right in. Choices vary but it is not a hard job. Good luck. | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | These trucks came with 6's in IMHO - everyone has a 350/350 combo.. like navels everyone has one. If don't have the engine/trans yet have a look here: Keep it inline with a modern GM inline 6 - 290 HP net | | | | | Joined: Mar 2012 Posts: 37 New Guy | | New Guy Joined: Mar 2012 Posts: 37 | Does anyone have any close up pics with the motor in the truck near firewall | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | 4200 It fits in with out having the hack the firewall. Even with the stock intake manifold.
Last edited by efi-diy; 04/08/2014 11:14 PM.
| | | | | Joined: Mar 2005 Posts: 1,513 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,513 | Hey Marc,
That Atlas engine looks pretty short sitting in a AD chassis. Do you know by how much compared to a 216/235/261?
1952 1300 Canadian 1/2 ton restomod You Tube | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | You can get the dimensions of the 4200 here: 4200 size for sure they are 150+ # lighter than a stovebolt. I don't have a stovebolt around to measure up.
Last edited by efi-diy; 04/09/2014 6:12 AM.
| | | | | Joined: Dec 2009 Posts: 292 Shop Shark | | Shop Shark Joined: Dec 2009 Posts: 292 | I used a 5.7 vortec and did not mess with the firewall dizzy is right up against it though. used orig. trans cross member with th350. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | You can get the dimensions of the 4200 here: 4200 size for sure they are 150+ # lighter than a stovebolt. I don't have a stovebolt around to measure up. I have made those measurements myself out of curiosity, the 216/235/261 and the 4200 Atlas are almost exact on length and width, with the 4200 only being about an inch shorter from the bottom of the block to the top of the cam cover.
Bill Burmeister
| | |
|
|
