Big Block vs. Small Block frame mounts
Can anyone tell me the difference between the motor mounts for a big block and a small block on a 1966 Chevelle? I have a pair of small block frame mounts and what I believe to be a pair of big block motor mounts. However I need to use them on a 454. Someone has told me that "technically" the frame mounts are different for a big block but many people have used the SB ones. Apparently the only difference is that the block will sit a little bit closer to the radiator support if I do use the SB mounts. Is this true? If so, how much further will the motor sit towards the front and will this cause problems when I use the stock driveshaft?