Thinking of swap out to one of these 2001 complete PI engines. 1 I was wondering though if I could in anyway use the Mustang returnless fuel system since I will have their intake with their egr and all the fun stuff. If I can do that, will there have to be something changed in the computer programing? 2 Also if I could anyway keep the coil on plug setup used on these. 3 Is there any other parts that I should get before I do the swap these motors seem to come with everything? Yeah I have read a some on this and I know most everyone has said to use the birds coil packs and fuel rails but I was wanting to know why it cant be converted over.