Hey,
Ive done alot of spark plug jobs on our cars, if you still sport your AC and factory IC tubing, its best to do your plugs from under the car, should take hr to 2 hours complete, I ditched the AC for performance reasons and ease of the plugs from the top I can do plugs in 25 mins heh.
The 2 plugs Ive used in the past and never have had problems with are:
Motorcraft double platinum spark plugs
stock replacement AWSF 34 PP, $8.96 each plus taxes.
Motorcraft copper core spark plugs colder for high boost applications,
equivalent to Autolite 103 AGSF 22 C, $3.09 each plus taxes.
If your not looking to change plugs often Id stick with the 34pp's, and gap them to .045, the stock gap on our cars is .054, at 11 pounds of boost, with a 10% im sure your seeing more like 14 pounds of boost, id drop it down to .045, now with the other plugs i listed, they are very performance oriented, but require yearly replacement, and I gap these at
.035, but im running 17.5 pounds of boost.
hope that helps.
Bruce
Sound about right?
Ps. thanx Bruce