318 build advise

Welcome to FABO. I would estimate 250 horsepower. A mild cam like you have and a 4 barrel will wake up a stock 318 a bit. As with any performance build adding parts like headers and cylinder heads will increase power but it all comes at a cost. $1000 will buy you headers and may be some cheap exhaust. $1000 will buy you a pair of Speedmaster heads but not the few hundred you should spend to make sure they are ready to run. If I were you I would bolt together what you have, go through your distributor with a proper advance curve and tune from there. What rear gear and tire size do you have. You can liven up a "teen" with a 3.55 rear gear and still be able to cruise at highway speeds.