The harmonic balancer's zero TDC mark (engraved line) needs to be at the specified mark on your timing tab, usually spot-welded to the timing cover. I usually start at 10deg Before Top Dead Center.
Be sure the distributor's vacuum advance is disconnected, and the vac line plugged.
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1982 Z28 w/ '01 LS1 + T56, TR224 cam, Katech oil pump, JWIS chain
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