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
You should be 1.7 1.8 60 ft with traction is the carb tuned?
whats the best time without the juice?
Best mph no spray?
shift rpm?
launch rpm?
should be close to 13.1 no spray