There are different bolt on timing tabs due to different balancer diameters. Make sure you have the right one. Many Chevrolet dealers carry these. You should check TDC, to make sure its correct.
69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1