The guys in Stock are well into the 10's with a stock stroke, stock heads, stock intake and carb, and stock lift. They are pretty close to your weight too.
Yes, I know that it's comparing apples and oranges, but a lot of their power comes from meticulous assembly and lots of little tricks.
I would think with the same care and better induction, heads, and camshaft you should be able to get close to the power they make without being ragged edge.