Heads Help!

Thanks all of the above! The car has the full Hotchkis TVS kit, and it's handling well, need more front brake and HP. I like the torque the engine currently has down low, and don't want to lose a lot of torque so I'm thinking I don't want/need too radicle a cam. I was hoping some sort of cam and heads/ head work would help the most for the $$ spent. Having my smog heads re-done, what should I have done and what should I expect to pay? I'd like to get the smog holes filled, mild port work and springs as suggested above, a little milling for compression? Anything else? Thanks again in advance...