After the swap you order engine parts for the year of 351 you have. but 302 front mounts etc alternator, power steering, are different from 351 and won't work. And you need 351 headers made for a mustang. several companys make them. 302 headers won't work. Good Luck And you can use the complete brackets from a ford f150 or bronco that came with the 351. You can use your alt. ps pump on these brackets
I don't really understand your question. What parts? All parts would still be the same as they have been except for engine specific items like air cleaners, oil filters, etc.. Those would have to be ordered to match whatever the engine came out of.