im picking up a 550 motor and im going to put the 550 top end on the 440 bottom end i have in my 89 js 440 ive read all about doing the swap and im pretty sure i got it but im just wonder with putting the 440 carb and exhuast on the 550 top end will i need to change the jets in the carb or will it be fine stock?? from what ive read its just a direct bolt on and go, but im just making sure theres nothing im missing because im doing it tomorrow arfternoon! i know i might have to clean up the case so the 550 piston skirts will clear it. besides that is there anything else i should do! and pump wise im just going to use the stock 440 pump for now untill i read some much about the pumps