I have an S-trim and just added an after cooler setup and a 2.75 Pulley\7.00 crank pulley with GT-40 iron heads. Not sure on the boost, but at 2.95 I was seeing 10lbs. I currently use AWSF-22C ford plugs which are 1 heat range colder. I was thinking of going to a NGK TR55IX plug because of the after cooler. Should I be okay with those plugs? Thankx.
