5.9, max safe compression?

gregsdart said

I haven't bought pistons yet, but figure the Sealed Power hyperuetechtic replacement. Dish pistons would be my best option. My goal is to get as tight a quench as I can and as much compression as 93 octane will allow.
I thought EQs were 58cc, but if they are 62 cc, that would work better yet.

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If you haven't bought pistons, get some kb107. They will be nearly even with the deck. Shoot for .035 to .045 clearance for good quench with the EQ closed chamber heads. Magnum style closed chambers are a LOT more resistant to detonation. Depending upon cam choice, with this combo you may not need to run the 93 octane.