I can see you have a 53 – 55-1st series 235.
I think you have a Chevrolet frame, not a GMC. The front cross member – where the front engine mount is looks like a Chevy. See attached link.
https://www.stovebolt.com/ubbthread...gmc-1-2-short-bed-frame.html#Post1346359. You can see the difference between the cross members. They are different due to the GMC engine being longer than the Chevy and the radiator is more forward.
Do you have Chevy or GMC front sheet metal?
