340 Max HP Potential with X/J heads?

It's easy to see from my dyno sheet that my build would peter out in a 1/4 mile run with the heads I have, so that is something to keep in mind if you plan to race it at all vs strictly street driven. It might do pretty decent at an 1/8 mile track and I will probably do that, for fun. I will also probably upgrade to some better heads eventually... who doesn't want better head??? LOL