I have some pics of the 670 ports and chambers after porting and chamber massaging (SD performance 260cfm), not sure if that will help?
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Derek B.
Current best: 11.97@110 1.65-60' !!!
'74 ventura,  (Fired july 14/06) '74 462 4-bolt (9.5-1), SCAT, Ross, T-II w/850DP (shaker455), TH350, Conti 10'' 3800, Supercomps, Magnaflow, 3'' Pypes, 3.73's, 28x13.5-15 ET streets.
1970 Beismeyer 17' flatbottom vdrive, 11.8:1 455P, ported heads, dual Qjet tunnel ram.
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