Okay I have the #'s off of the heads. D1AE GA: These are the specs=
1970-71 D1AE-GA 4V (Closed chamber)
Chamber volume 62.8cc
intake valve diameter 2.19"
exhaust valve diameter 1.71"
Intake port diameter 2.50 x 1.75"
exhaust port diameter 2.00 x 1.74"
Uses a 4 barrel carberator.
These heads compare nearly exactly to Boss head specs see: http://home.comcast.net/~jeler.../Specs/heads-fr.html
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