[Hozer 88GTConv]

PKRWUD,
This is the first test I have done with TRW flattop pistons and a .030" overbore. I am guessing my compression is about 9.5. Do you have a ballpark PSI figure? I am going to check the entire left bank of cylinders.
I have been "losing" a little oil over the last few months and a little coolant but I never could find evidence during an oil change or coolant flush. Just this number 5 cylinder plug always being a little oily.
I have a feeling when I dyno'ed 258 rwhp before the blower, which was about 30 hp low for my combo 6 months ago that I had the beginnings of a head gasket problem.
What is surprising is that it is relatively subtle. Very slow leaks but I think this has finally done it...
and I just put new headers and plugs on yesterday...Murphy's Law...