Sam,
I have been following your post. The piston your running came out of a T37 stock we ran 20 years ago (Jay and I) It's amazing it's on the other side of the world now. I doubt the little tighter pin would make the noise since a piston expands and becomes looser on the wrist pin as it warms up. Typically most piston noise's usually change significantly as the engine warms. And if I remember right the other seven pistons pin fit were similar to the one you have in your car as Jay stated. Iknow you have looked over the engine for exhaust leaks. The exhaust crossover on the intake is pretty hard to diagnose if it leaks on the bottom. I didn't detect much noise difference with your valve covers Off/on. I expected a much louder noise with them off. I was wondering if you did? I did notice the valve train noise was louder...as it should... just wasn't sure if your tic got louder.
Ty
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