Basically just new headers. But some of the 302 headers fit the 351W. The tranny will mount up to the 351W. The deck height is a little taller and it is about 1 inche wider than your 302. We went with one with a rear sump oil pan to avoid the clearance problems with the rack and pinion. It was simple and easy.
I would go to the salvage yard and pick me up a 302 roller or 351 roller. You can get a for under $100's. Get a mild solid roller cam and solid roller lifters. Get a set of heads from a 93-95 cobra for about $45 a piece or a set a GT 40 heads. They are pretty much the same thing. A set a 1.5 or 1.6 roller rocker for about $100. You options is really up to you.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!