Moved to correct forum by JSM84
When sawpping to a 460 from the 300I-6, you need both new motor mounts and frame perches. You could use the 302 supports, but still need the motor mounts from L&L Products or similar. I'm currently swapping a 460 into my 84 Bronco that had a 351W. IF you need more help, I'll watch this thread. JSM84