a question for CACollo (anyone else can also answer)

Well as far as the vibration goes, I am hoping its my mounts. I looked at an 84 t-bird that my friend owns (the 84 t-bird engine is almost exactly like my 77 302) and when he reved the engine his mounts had a good amount of give in them. Mine one the other had dont really give at all. I am hoping this is the problem, but if not i will start looking at the balancing of my engine.