I am looking into buying a 92' GT that has a 351w w/ a spun rod bearing. I will be taking the engine out and replacing it w/ a 302. It has GT-40 heads and BBK headers. Can I reuse the heads and headers on the 302, or are they different?? Someone said that 351w require a different set of headers, but the heads will bolt on a 302. How can that be??