Depends on what your goals are. A decent port job, 3-angle valve job, the correct intake, cam, exhaust and gears, fuel pump, tune, etc, you can get a 5 -spd car in the mid/low 12's in the qtr. If you are on a budget and can port them yourself, you can make good power for super cheap. I would encourage you to try and port them yourself. May want to get a junk head from a machine shop and if you buy the Standard Abrasives kit, it will come with instructions. Just get a set of calipers for measuring too.