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Yep, just cam lift. That is where BBC motors have a slight edge, they come with 1.7 ratio rockers stock. We are stuck with 1.5, which adds to the total weight the springs need to control .

So help me understand this,you're saying that an 1.5 is heavier than a 1.7?I know that the 1.7 adds to the lift.
One reason i bring this cam ? up is that generaly GM blocks seems to run much bigger cams than crylers.Do they use a bigger bearing jounal than us crysler guys to help support the cam flex?