Thread: Harmonic balancer on 454 has 4 timing marks.....

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the long mark is the one you set your timing. other marks are not stock as whey look like they were put in with a ax. if a mark 5 engine with a tin front cover they had a two timing tabs on the cover one like all bbc at around 3:00 and one down around 5:00 look s like that damper had them marks re marked for total curve 32 the 35 the 36 ???.measure from the gm O tdc long mark and i can tell you if them hash marks are 35 or 26 or ??? them holes are nothing but holes used when mass was balanced and is very common to see a row of holes . but may not be in the same place is there more of balancing deal