Fred, I can't help you with that 460 engine problem. I can tell you my last truck was an E-350 14' Cube van with a 351W and C-6. It came with 4:11 gears and 8.00 X 16.5 duallys which I changed to 9.50 X 16.5. My 351 had 11 to 1 pop ups with crane cam and lifte... Login to read more.