Cylinder head discussion 340 with stock above deck pistons

2.0 60' 13.1 at 108mph im running micky street slicks 235/60r15 if I can increase horsepower and get a better 60' that would be even better. I've always wanted to get better heads and increase some power. And lower the weight on front end too

Your mph is enough to run low 12’s. I would work on your incrementals first. Especially the. 60 foot