LOL Yeah a person learns a thing or two about most all makes when he has spent most his life turning wrenches for a living and as a hobby.
If the 327 heads are the 64cc chamber, using them on a 350 with dished should put you in that range for compression. Here is a link that you might find useful:
http://www.prestage.com/
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North Dakotas fastest REAL GTO
10.10 @ 131 MPH in the 1/4
Hoping to get it back together some year.
www.jandjrepairandrestoration