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if I run a compression check on 11-1 355 with 64cc heads what should the psi be
That will be different for every engine.. Cam specs, head flow characteristics, valve size, seal, etc, ring size, seal and gaps all have an effect.

I've seen 13:1 engines puff 170 #'s and I've seen 8:1 smog motors puff close to 195 #'s... Go figure.
 

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Cam Intake valve closing point has a big effect on compression pressure.
 

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i agree with them up der ^^^^^ but im going to say so long as its high it would be fine are you having problems. i did one on my motor a couple days ago and they are all at 200 p.s.i. and its a 11.1 to 1 355 but im sure yours is different then mine :yes:
 
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