Well, your measurements tell you it probably won't place the original wheels under the fenders where they fit...
Are wheels available with the necessary 2" different back spacing? Are you OK with using different wheels front and rear?

Another option is a GM 14 bolt rear axle, they come about 63" wide in some applications.
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=686209&page=1

Grigg


•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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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-