I did the same on my '68, factory intake and Qjet with a Ram Air III camshaft really woke it up.

If you have #17 heads, a little bit of port work will be all you need. They breath pretty good for "2bbl" heads.

The biggest thing besides camshaft would be your rear end. You probably have "tall" or highway gears with that 2 speed. I recommend going to at least a 3.08.

Of course, it all depends on how much you want to spend.