It really depends on how far you want to go with it, and what type of driving you do with the car. If you also to keep it relatively stock looking, and what kind of budget you are looking at. You could start off with a cam a little more spec'd for low end toque and a 4 BBL, maybe some better flowing exhaust and a 323 gear. Beyond that, Decking the block, a nice set of 340 or 360 heads, upgraded ignition, higher compression ratio, larger bore. it really depends on how far you want to go with it. I think you can get a 360 crate motor from Jegs for about $2500 that has 400 ft/lb of torque if you are not worried about keeping the original engine.