With 670s and flat tops, thinking around 460 lift and an adv duration of about 290 or 295 will give you what your looking for. 670s work well with a moderate cam in that range. As for manifold, the factory 4bbl one works about as well as the after market ones for what you're talking about. You will need some octane, (see how it runs to know how much, 93? Probably need higher) and some lead additive if you don't have hardened valve seats. I'm no expert, but that's my experience.
With those gears it should really scoot on the street.