Those heads would be ok for a set up from a stocker, and I've seen many people use them small valve, small combustion chamber vortec head and makes good power they are some torque monsters for a small block 350, but if you have the older 194 "smog heads" your fighting a losing battle, you need comp and flow or velocity, those smog heads heads have neither.
I would recomend saving your money up and getting a good set of aluminum heads you can score some for about 900 to 1000 dollar mark easy, they are money well spent. Then build a flat topped 350 with a slightly aggresive bump stick with a dual or single plane intake, with a 650 or 750 double pumer holley for some serious street power.
Goodluck, Charles.