i got a 305 tpi with 67,000 on it. with summit shorty headers, 3 inch header back exhaust, ebay cai, short runners and a crane 2032 cam. how much power / tq should i be puttin to the ground?

 

The cam headers and exhaust are good for probably 50HP and 70 ft/lb torque. I assume you've made tuning changes such as increased fuel pressure, additional timing advance. You'd get more with head work(porting, polishing and springs) to compliment the increased lift and duration. What you have now should put you at about 270-280HP at the crank. WHP is about 70-80 less than crank HP on an auto car.

This is just a rough guess.

 

I should qualify what I said earlier by adding that the stock TPI intake is good for about 350 flywheel HP from a 350 or about 325hp from a 305. Peak torque at this level will be about 400lb/ft from the 305, 450lb/ft from the 350. To get this you need either some extensive work on the factory heads or a decent set of 190cc aftermarket heads and a cam in the range of 220-230 degrees at .050 and around .500-.520 lift. The headers and exhaust you already have will easily support this.

The 305 has an issue with valve shrouding/interference with 2.02 heads and larger cams. You can help this with a slight bit of work at the cylinder tops. There are threads on this forum where this is detailed.