The chip might need some re-programming, depending on how "Stock" your 5.7 is or is not? If you have removed emissions, changed injectors, modified the exhaust system, or have an aftermarket performance intake the chip will very likely need re-programming. I would expect a factory 5.7 liter / manual trans chip would be a HUGE improvement from a factory 4.3 liter / manual trans chip for your engine swap.

dave w