Hybrid Questions.....

[Weston19]

First i'll tell you what im runnin and i suppose we can go from there.
91 3.1 Gen2--Stock Pistons, Crank, Rods, stock bottom end
Comp cams 260h---260 duration .440 lift
3400 heads-Comp 1.6 rockers, Comp 26986 Springs, 3500 valves
3400 LIM--
3500 upper
0.040" Camaro h/g's
Motor sees 6500 rpms max


Basically, all i need to know, is what is my safe working limit on what i can remove from the heads and make sure my valves stay straight, dont feel like putting grooves in my pistons. I know I know i should use pistons to raise compression, however, this motor just needs to get me into the 13's. After that its getting yanked and ill be dropping a 3500 in. Im upgrading everything and doing some port matching and polishing, but i dont want to risk spending money on this motor to not reach my goal. I have a wideband and egt, it has supporting mods for all this, i just want a little bit more. If anybody has any idea lmk please.

[Superdave]

Headers?

if so, that's plenty to get into the 13's as is. a little bump in compression won't make enough difference.

working on the trans is what really helped me out, my super short throw shifter along with the Quad 4 gate select and shift arms, solid mounts and slicks made it hard to run slower than a 13.5. oh yah, and tuning.. lots and lots of that.

[2.8/3400 1985 Camaro]

Better intake and exhaust system if you haven't done that already. Anything else wouldn't really be cost effective since you're just going to yank the engine...
Also, I'm curious what you're running right now and what your hp and tq are on that setup?