In all vehicles except the Camaro and the Nova the frame stands are the same for all engines.
Only the first gen Camaro and the X body Nova required a unique frame stand. This was because the motor was too big to fit in the engine compartment without hitting the steering gear box; so they moved the BBC up and over to clear it with special frame stands.
Those disc brakes and hide-a-way headlights are rare options in 1969 and are worth pulling if you still have the car.
I do mostly Camaro,F-bird,Chevelle and GTO cars.Thanks for the reply.FYI 65-67 Chevelles had different frame stands for Big and Small block.In all fairness to you it was only because the Big block used a larger HD eng. mount,so the frame stand was clearanced for it,I have a muscle car junkyard and need to do something with all this stuff,as I'm getting old and have a fair amount of fullsize stuff.I don't know how old you are,but clearly are very knowledgible.Thanks again