Crossmember at the transmission is different, the 54 uses angled mounts on the bellhousing. However you could easily swap bellhousings to put your Stovebolt in either early or late frame.

From what I know and for what you want to do any 47-54 frame should work.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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