When I tried to put a pick-up truck grill in my 56 6100 I found that the grill opening in my 6100 is 5 1/2" wider and 2 1/2" taller than its little brother, the grills will not interchange. I don't know about the core support but yes all the cab stuff is the same with the exception of the LCF trucks. The hood is the same between the TF big bolts and the little one again with the exception of the LCF trucks and a slight differance between 56 and 57 body lines on the hood.
Last edited by HevyHauler; 05/06/2008 2:30 AM.
