I am currently trying to decide on which engine to go with for a classic Challenger, I want a gen 3 Hemi but I'm not sure which one. The 5.7 seems like a powerful and reliable motor, since it goes in a lot of trucks and can be made to really scoot. However, I love the idea of having a 392 stroker, or 426 stroker. My main question is, what parts between the 392 and the 426 are interchangeable? What parts that are made for the 392 can I use on the 426?