I have 220 psi per cylinder and that is only 10.750 to 1 compression.
In your intake manifold tap a small hole for a vacume gauge. Under full load "on dyno" it should read almost zero. If it is produceing vacume then your running lean and it needs more fuel.
Do you have a fuel pump on it or is it still gravity feed ?
You are on the verge of race fuel and it wouldn't hurt , don't use A/F gas it has antifreeze in it.
Set your timing on the dyno under full load , go for highest rpm under load. We use a digital timing light with a tach in it.
Email me direct if you have any more questions, i run a dyno service.
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