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Got my open chamber heads (3418915B's) back from the machine shop. They removed 0.012 from the deck side to reduce the chamber size to adjust compression. They did not take any material off the intake side of the head. I've performed a trial fit of the intake manifold / heads on the motor with...

Working on my 1970 340. I have open chamber "O" heads (3418915B), 2.02 / 1.60's with tulip valves. Just got the heads back from the machine shop after a cleanup on the seats and valves. The combustion chambers are measuring an average of 78cc's, so they're going back to the shop to remove 0.020...

I'm an E-Body owner and have spent a lot of time on this Forum and have been impressed by the number of knowledgeable people on small block engine builds, what works, what doesn't. So here's my problem. Working on a 1970 340. Currently out of the car for a refresh. I'm trying to calculate the...