The Stovebolt Site Forums The Shop Area General Truck Talk Parts interchange between AD 235 and Task Force 235

I have a 1956 3600 with a 235 that has a cracked block. I also have a 235 from 54-55 on a pallet that I was hoping to swap in but there appears to be some differences. The main parts I'm worried about are motor mounts, manifolds, and transmission. Does anyone here know if those parts will interchange or what it would take to make that swap? Thanks in advance for any help.

If the front of the 1954-55 engine does not have the mounting holes, they can be drilled as follows:
https://www.stovebolt.com/techtips/engines/motor_mount_front/index.html
https://www.stovebolt.com/techtips/motormount_235.html

Engine to transmission no problem.
To simplify explanation use the bell housing, flywheel, clutch parts and starter from the 1956.
Chevrolet changed from 6 volts to 12 volts beginning 1955 2nd. This affects the number of teeth on the flywheel.

If the 1954-55 is a car engine, it will most likely have an automatic choke carburetor but you can swap that out.

The last change in the exhaust manifold design was in 1951 so you should be okay.
Check that the exhaust dampener works. Turn by hand, it should rotate and spring back when released.
If not you may want to swap manifolds.

I would make a cradle for the 1954-55 and test that it runs okay before installing.
Details can be provided.

Awesome info, thanks. Just for a little clarification, the 56 that's in the truck has The side front motor mounts while the 54-55 has the front mount under the balancer. Would I be drilling the crossember for the front mount or the 54 block for the side mounts?

The water pump on a 1954-55 is shorter and the fan is 3” higher.

Matt B you are correct. I had to go look at my 1955.
The holes for "side mount front" are not in the 1954 and 1955 1st casting.

Dave is correct about the water pump.

It looks like I just went through an exercise in futility on my part.
It would take motor mount fabrication, a water pump pulley diameter change (rotational speed) then adding an electrical fan for cooling.
Once you add up the price tag, it's simply not worth it.

I was really hoping you could use that engine.