OK you said stock....Still we need new pistons,rods,bearings,timing set, oil pump, cam, heads rbuilt with guides and SS valves, water pump, rings, and a gasket set. That has to be a minumum of $1500 plus some machine work, add $500 and make it Min. $2000... I belive you could make 500 hp for $5000. The difference being ,heads, intake, carburation, better rods and pistons and oil pan, machine work, and a stroked crank, I think I just ran out of money with the crank!!