Need some more info. A 302 to 351 Windsor is a very easy swap. It may take a few tweeks here and there with the wider block and the accessories will be a little different but nothing a back-yard gear head can't handle. If it is a 351 M , forget it the bell housing is different but that vintage I hope its a cleveland and thats a great swap. Great engine and great power. Exhaust can get tricky with smaller engine compartment and the clutch may need a little riggin but only on the width. Pretty easy swap and is well worth it HP wise.