from everything I have been told the 35-42 frames will work with the the truck. there is a couple differences but nothing major I have been told mainly the transmission mount. I wish it was a little close to St.louis I would be interested in it for my 37 ford pickup
I also agree the 35-40 car frame would be interchangeable for 34-41 PICKUP trucks...I think the ultra full size ton or ton and a half trucks would be different