What will my 340 run? and what intake and carb?

Well, this is what I would do following your guide line of 95% street.

IF your going to use the T-Q, put it on top of a Weiand Action Plus intake. It's designed for the T-Q's secondaries huge size.

IF your going with a new carb, a squarebore, a RPM intake would be my choice. Ethier cabr size will work well. I'd just would get a double pumper. Because it is a manual tranny.
My personal choice would be a 650 cfm.

When you get to the track, try shifting at different RPM's and see what your times are. Pay attention to your 60 ft. times and every thing else on the slip. With the cam you have now, I don't see much of a reason to shift above 6,000 rpm's.