Cylinder head discussion 340 with stock above deck pistons

I would not buy open chamber Eddys required to clear your above deck pistons because later if you want to build a zero deck piston with ideal quench then open chamber heads wont allow you to get the quench. Maybe closed chamber Eddys or Trick Flows run thicker head gasket to clear pistons. But then might need thicker intake gaskets to make it work.

Aluminum heads chop massive weight off front of car thats a huge benefit.

Now back to the your car should be faster you don't need heads discussion....
Thanks for the input about heads, I'm also considering port matching my current j heads and doing a light blend and polish to increase a bit of flow without changing things to drastically. As for my car going faster I really need to take it to the track again and hit it harder off the line as I don't think I've hit the limit of my tires or suspension just yet. My trap rpm was a bit low too, I think I was crossing the line around 5000rpm. Might try a set of 3.9 gears and see if that does the trick to get my rpm up 500 ish more when I'm crossing the line. It should help me get out of the hole a bit quicker too. I want to take small adjustments to get the car faster so I'll know what worked or didn't work when I try it. I've also put thought into a double pumper vs vacuum secondary. Right now my 3310 has the lightest spring and has a decent WOT afr. I could bring jets to the track and try leaning it out to see if I get more mph, the tough part is getting to the track. I live on and island and I have to go to the mainland to get to a track. Ends up being am expensive trip and it can't be done same day as the races start in the evening. So far I trailer my car there. I wish the track in my town wasn't torn down for condos, what a damn shame........