On the '60-'62 Chevy trucks, the cab mounting & rear frame rail dimensions are:
Front frame-to-cab perch, center-to-center width, is 51-1/2"
Rear frame-to-cab perch, center-to-center width, is 41"
Rear frame width at frame rail end, is 42"
On the '63-'66 Chevy truck, the cab mounting & rear frame rail dimensions are:
Front frame-to-cab per, center-to-center width, is 42"
Rear frame-to-cab perch, center-to-center width, is 41"
Rear frame width at frame rail end, is 34-3/4"
Last edited by 4-5-6 Chevy Trucks; 08/10/2012 2:36 PM.