I think so. I found a set of pi cams on a 2008 Grand Marquis with 22k miles at the boneyard for 25 for the set. What do you mean by factory timing marks? You mean keep it timed to factory spec?Same thing happened to me when I did the intake on my 98. Wish I saw this thread earlier... #5 was crudded up like crazy.
Best wires you can get are the black Motorcrafts if they are still available on Rockauto.
You plan on swapping to PI or aftermarket NPI cams? PI cam swap just factory timing marks will add a lot of power.
Sent from my COR-L29 using Tapatalk
Sent from my SM-G970U1 using Tapatalk