Yes, I tend to make things confusing.
1952 GMC truck is what I started with. It came with a 292 motor that was installed but I believe was never ran, and a drive shaft that was cut half way through, and a chassis that was butchered too.
So I found a 1950 Chevy truck Chassis with a good rear end and drive shaft. So my intention was to put the GMC body on the chevy chassis, wanting to keep it semi original at least in appearance.
I took a tape measure and compared both chassis. The only difference is the front crossmember. They are both riveted in identically. So I am going to swap them and hopefully everything will work out. Since the 292 is longer, it will probably ride slightly over and into the radiator support, that will require additional fabrication. I still haven't found a picture of the GMC radiator support in place.