Hy 2-Ton, I was able to find a couple of different Napa p/ns for the V6 engines, I actually could not find a listing for the 637 V8. Here are the two Napa numbers I was able to find NFP M3987 $51.49, and NFP M3955 $45.49, I crossed these numbers to Napa numbers from AC numbers 4777, and 4754 using the interchange feature on Napas website, hope that helps.
