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Old 05-03-2013, 08:54 PM
dusterbd dusterbd is offline
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sbc harmonic balancer. need guidance.

ok, so ive got a 73 vintage 350 in my project. codes came back as a truck motor with a 3 speed behind it.
at some point it was freshened. unknown to what extent. runs good, sounds good, checks out healthy. pretty strong, too.

anyway, i converted it to serpentine accessories. in the process, i discovered that the harmonic balancer has 3 nubs sticking out in addition to the three pully bolt holes. ive never seen this. nor does any of the aftermarket pullies support this. all of them only have the 3 bolt holes. i drilled my serpentine crank pully to account for them, but it now does not run true. dont know why. planning on clearancing the holes a little more, and seeing if i can get it to self align.

makes me wonder just what the balancer is off of.
also, makes me wonder if i can grind those nubs off. make it so i can run an unmodified pully.
what do you small block guys say? im kind of baffled here.

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