once you do the intake, tuner and pipes, nothing really comes cheap,
next step is cams, and at that point might as well go with higher compression pistons, and since the heads are off anyways its a good time to do headwork, thats why i say nothing comes too cheap
just a set of screamin eagle performance cams will be ok, but if wanting alot of power, save some cash and do everything at once
80hp is pretty easy to get without stressing the motor too much, and 80 hp on a sporty would be alot of fun