I just bought some new plugs today. I called NGK directly and he recommended that i try the TR6. He said it's what is comparable to the ar103. He also mentioned something that i haven't thought of and that was that carbon build up might be the trouble if it's not a valve or a piece of the piston striking it. So i had a can of seafoam that i ran through it tonight with my current plugs and i'm putting in the ngk's tomorrow.
And it's possible that i might have found someone with a scope that could check it out for me. i've been digging around online so much to find someone and i came across a guy on the turbo buick forums that works at a machine shop up in bartlesville. He didn't have one himself but knows several professional racers in the area that probably would. He's going to call them and get back to me so i have my fingers crossed.
