Your compression numbers are low for a rebuilt engine. Rough calculation would show you at about 7.8 to 1. Not the recipe for a 300+ hp engine. I would take a hard look at the cam timing before you go crazy. The timing chain being off a tooth can affect compression. I would expect to see at least 135 compression in each cylinder. This is assuming the combo is setup to produce around 9:1 compression ratio.
If the exhaust valves are a little tight or the valve job was sub par this could also be part of the problem.
Dont assume you only have 1 issue.
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