Here's some frame hole dimensions from the FAM
All referenced from the front of the dash.
Front Body Mount - 13.186"
Rear Body Mount - 50.186"
Front Bed Mount - 62.75"
Rear Bed Mount - 133.688" (this is the rearmost hole in the frame.)

Hope that helps.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.