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Are the PC valve seals the white Teflon seals ?
If so there is a big part of your problem. You need to pull both heads , take them back to the machine shop , probably expect to replace all the exh valves and switch to a viton seal or an umbrella seal.



not sure if teflon or not, but I will find out. whats the problem with teflon? thanks



They are harsh on the valve stems , not good for a street engine , so I have read ?

I'd change them out while the heads are off and apart .