Re: 67-69 Engine frame brackets ??
The big block is offset 1/2" to the passenger and 3/4's" forward of the small blocks location. Most importantly you must change the transmission crossmember to match. If this is not done, the engine will sit crooked and headers or exhaust manifolds may hit the steering box. The small block framestands are also a little different in height, but not by much.The small blocks are considered to be "on center".
This chart may answer a few questions or create more questions !
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