Hot Rods Planning to put gen1 392 in 37 Plymouth coupe

Planning to put a first-generation 392 Hemi in a 37 Plymouth coupe already have 392 already have 37 Plymouth
Probably a silly question but for the street do I need to box the frame and what other modifications am I going to need
833 4 speed ,8 and 3/4 rear end 3.23 gears

 

How hot will the 392 be? Stock it should be fine, they have a beefy frame as it is. Same set up in my car but mines pretty snotty.

 

Pretty much stock well probably around 400 to 450 horse nothing really special
Hot heads .480 cam with the 112 ls
10.5:1 compression 2x4 intake 2 500 Edelbrocks
I'll run the stock 392 heads with hardened seats
Just a nice mild Street set up

 

How is your setup do you have any pics

 

The 392 is pretty heavy so I would reinforce the frame at least in the engine compartment...other than that probably have no issues with it....

 

Have these for now.

 

Your front frame is already boxed. The center section of the frame isn't boxed but is plenty strong with the X member. Make sure to check the factory welds, we found a bunch cracked on our 37 Dodge coupe frame. We have A stroker 392 with a torqueflite that is street driven and drag raced with the original frame modified. Most chassis mods were for the suspension upgrades, not to add strenght. The first pic is at the chassis shop.

 

Thanks for the advice what do you mean by reinforce the frame
37 Plymouth are already boxed in the front and rear
Would you put in a crossbar for reinforcements or ADD metal to the frame itself

 

I wouldn't worry to much about the weight of the hemi. Those flathead 6 arent much different in weight depending how the Hemi is dressed.

 

Not to familiar with those cars but sounds like you wouldn't have any issues...

 

I put a long bellhousing 331 hemi w/ very heavy Hydro tranny in my '36 Willys stock frame 55 years ago. I cut up the original X-member and welded it into the frame rails to box them. Then welded in a 2" square tubing crossmember to hold the back of the tranny and a '56 Olds shock crossmember to mount the rear shocks. No problems so far. Just a cruiser, not a racer though.

 

Man that's a cool ride looks like it would be a blast to drive I love that slapstick man that looks fun

 

A picture is worth a thousand words thanks for the pics I can see you welded the seams of the boxed parts of the frame I'll do the same looks like you left your rivets in that's cool I can stop worrying about that and it doesn't look like you had to set your firewall back just do a cutout for the distributor I like that how does it run with the dual four barrels on it

 

I can't take credit for building the frame. If I built it again, I would make the firewall cutout larger. As for how it runs, not quite right yet. We are still figuring this dual quad deal out, but has gone 12.50 in the quarter so far.