Search 98saleen on YouTube. Friend of mine who put a 5.7 and trans out of an 06 Charger R/T in his 68 Charger. Very detailed swap. I think he used headers but lots of info. His channel is mustang heavy (his stuff is badass and fast). He went whole hog on the 68 charger and I am impressed. Drove by my house in it this morning looking and sounding good.