Up front, Tony went with a Meziere electric water pump, TCI Rattler damper, and a Jesel belt drive. The belt drive put the Comp cam at a 102-degree centerline. Tony says, "I would have liked to advance the cam even more, but the valve-to-piston clearance wasn't there."
Is that a P29 next to a PM3?clay is your friend, then factor in rod stretch.
but also measure how far the piston is sticking up, DO NOT really SOLELY on the compression calcs.
Also I suggest making sure the deck of the block is square before trying to kiss the pistons, the head will need each chamber cc'd to ensure even sizes.
Also note this won't be a good idea for a street motor. That .020" at street rpm = a little carbon buildup, go for max rpms and kiss kiss bang bang, game over.
some pics to look over
R5671A's????? Wait, don't I use them in a Honda?