Robin, Richard has some good advice about looking for a entire car. You never know and may come across something. Off the top of my head I don't think there was a 2bbl 428 offered as the 428 was the performance engine that kind of took the place of the expensive 427. Ford was looking for a budget performance engine and the 428 was it. Yes they are a little harder to come by but they are out there. I'd also recommend trying to find a complete long or short block to try to save some money. Now the 428 will be more expensive than finding a $200 390. Most 428 short blocks are $1000 to 2000 some are rebuilt and some not and longblocks a little more. But thats just a basic comparison. As you read the books and become more familer you will understand how to ID engines and components for the different years and displacments. This site is a must read www.428cobrajet.org This is the CJ registry and an excellent source of info and seeing the different components of the 428 CJ and SCJ engines. Also some good reading about the two. Your very smart reading up on things first before diving in as this is an expensive hobby. Another good forum is the Ford FE forum at network 54 www.fordfe.com So good luck and I'll keep a look out for a 428 and pass info along to you. Oh and the mustang 428 cars were R, Q and P codes not S codes and started in 68 1/2 and were in the Mustangs, Shelby's, LTD police cars, Galaxies, Fairlanes and some I think in Tbirds to name a few. Mercury had their line of cars as well. So ask questions as you go and find things out. Good luck and that stang sounds like a nice one. G.