Parts?

What would be the advantage or goal of swapping out the intake but keeping the same 2v carb?

Glad rockauto worked out for you. I just put in another order yesterday, already shipped out today.

For aftermarket/performance type stuff, I usually check out Mancini and Summit first, and sometimes Jegs, though I haven't ordered from Jegs in years. But in the past year, I've had a couple orders each with Mancini and Summit, all with no issues.