I need help with a question. I bought a new 90mm MAS complete with housing and all. Can I put my Original MAS in the bigger housing without calibrating? It is a 2000 MUstang Gt. I will Calibrate when I up grade to bigger injectors but I just need to know if it is safe to do this till i get more cash for more up grades. I am just trying to get it more air for now. Anybody know? thanks