As Rob mentioned .060 is not an issue. My 1st Cammer was bored to .060 and I ran that one for years.
Have you checked with EGGE on Pistons?
As far as the Cam Tower not having the relief for a Thermostat, That would be a first for me. If this is the case either a swap or possibly having it machined?
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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
