I just went through this with the 95 GT I bought recently for next to nothing because the guy that built it didn't have a clue. It had 4 thread plugs in X series heads among a bunch of other stupid crap. I like the Motorcraft copper plugs personally and am running the AGSF-22C in this car. FRPP 302 short block with GT40X heads, Motorsports intake, 70mm BBK TB, 24# injectors, Mac shorties, UPR catted X into Dynomax's. TwEECer tuned.
Acutally I just double checked Ford Racing on the GT40X and it says it can use either the tapered or gasketed 8 thread plugs.
2005 F250 Super Duty Harley Davidson True Blue
1997 SVT Cobra Pacific Green
1995 5.0 GT Dark Forest Green
If you aren't living on the edge, you're takin' up too much space!
Last edited by PGreenSVT; 05-05-2009 at 10:02 AM.
Reason: updated info