340 build

Here's how to check the compression of your engine components:

How to Check Compression
Man thats alot of math, Ill have to go thru it more carefully, I must have missed where you mentioned what to do as far as filling the cylinder if you have pistons that sit above the deck surface, Im sure its there.

If it don't say 340 cast only then its a 360. either way it's NOT for a forged crank. Aka internal balanced.
Man no wonder you got this 340 for a song. .....vibrates, like a MO FO, over reved it and now it has a miss due to leaking bent valves.........
You might want to roll them push rod on a flat surface and see if you have any bent ones.
360 would make sense, from what I see on the net the connecting rods appear to be 360 as well according to the part number on them unless Im mistaken

I already threw the pushrods in the oil pan, I figured I better just go ahead and replace them.

I dont see any leaks though around the valve seats so Im assuming the heads are fine