I have an 87 HO 5.0 engine and I want to install a Hi Performance cam from the Ford Raceing Catalog that would be a little bit bigger than the Cobra cam. I have converted over to the Mass Air Flow System. can anybody help me choose a cam. I am going to include the pedastil roller rockers and taller valve covers with spacer plate to raise the plenium to clear valve covers. I will be running the EFI set also.