408 build

A408Cuda said

Would a smaller cam make it more street-able? If so how do you determine the cam size, I've often been confused about the real difference between say the OP's .573 and .590 and say .566 and .583 does it really make that much difference? seems like such a small change.

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Lift being equal, you will feel a difference down in the, but, correct, it won't be a big difference for that amount of change.

IMHO, you start with application and knowledge (experience, that you learn your self or from others). If 'more streetable' is desired, then you move to improve lower- and mid-range torque, and that typically drives to lower durations and cam timing changes (more advanced cam timing) to get the intake to close earlier to help build cylinder pressure higher. With some level of static compression ratio, both work to move the dynamic compression ratio number (DCR) up. That has a direct impact on low to mid RPM torque, but less so on high RPM power. LSA changes (usually a wider LSA) are made to make the very low RPM operations smoother (idle, off-idle).