You can not use the 302 ac bracket on the 351. it will not work. you need a 351 bracket from junk yard or summit. the 302 headers wont work on a 351 because of the deck height difference between the two motors. they will bolt up but your h pipe will not reach them. the swap is a piece of cake...
John, you can do that but it will be a bear to turn....unless you have gorrilla arms! Power and manual racks arent even close to the same as far as trying to turn them with out power. I wouldnt guess its not good on the rack either.
Im on the same boat as you, I'm doing the same swap and after reading tonss of different swap articles on one I've heard you can use the stock 302 p/s and a/c bracket but need to use some washers or spacers. Since the only difference I see is the deckheight and the heads are the same (head bracket holes) maybe all you need to do is drill new holes in the bracket? nay or yay? anybody got some info on this?