Quote:
Originally Posted by Skip Fix
The 6x-4 heads I have on the 400 in the '81 I pulled off an original 350 in a yard. They were 92.5cc. I smoothed the ridge in the chamber and then milled the 0.050 and they were still 92.5.
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Exactly what I was thinking Skip. Smoothing the ridge and assuming pistons will be in the hole .010 or even more will put you in the "happy zone" even on 87. A valve job may add even more chamber volume. With a fairly big cam I would not think twice about it.