Update: I finally got the truck and started taking measurements today.
57 GMC (2 TON) outside front tire measurements 73.5" (original skinny front tires)
94 1/2 Chevrolet 4x4 outside tire measurements 74" (factory 4x4 tires)
Front frame rails on (both) trucks approx 35" (outside measurements)
--> The cab will sit perfectly over the 350 engine with plenty of room and the front wheels will fit perfectly into the front wheel wells.
-------------------------------------------
Last edited by Mike Nelson; 11/22/2010 1:21 AM.