Well there is a reason for that, TOFC, Auto Racks and 86' Auto Box cars ride on 33" 70 ton Roller bearing trucks as apposed to the 36" 100 Ton trucks, these trucks are more at home with heavy haulers like modern Hopper, Tanks and the like.
I have converted 11 MTH Auto racks and even with the 70 ton 33" roller bearing trucks, the bolster are still a bit too high for my liking, so I lowered 3/32" by boring out the king pin hole until the truck rests on the outer MTH truck bolster ring and then milled out the coupler mounting pad and lateral deck supports directly under the trucks flush with the with the deck for that proper Low-Ride look. They look, perform great on our modular layout. See us on YouTube under Southeastern Florida O Scalers
Sincerely Walt
aka Waldo
Conductor FEC Hialeah Yard 1989-91
