Re: motor mount problem need help!!
Big Block frame mounts (and small blocks too) are of the short and wide or tall and narrow kind. You are most likely using tall and narrow frame mounts but you are using short and wide engine mounts. They won't mix. Get the right motor mounts, tall and narrow for a 69' should be what you need. ( There are 67-68 frame mounts and 69 frame mounts.)
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