I know there is a plethora of info out there on doing these swaps. I currently have a 289 in my 67 Cougar and I may want to swap to EFI in the nest year or so. I know that the firing order of a 5.0 HO is the same as that of a 351W. My question (or maybe looking for conformation) is that if I swap in a 351W cam into my 289, will I be able to use the "stock" harness and retain the proper idle qualities that I would need.
Thanks,
Jason
Thanks,
Jason