I haven't posted here in a while, relocated to WV for work and have been really busy. My car is mostly a weekender for car shows but I'm planning to bump the ins. to cover me for drives to work when it's nice out this summer. Thanks in advance if anyone has advice or a past experience that helps me out here. I'm not sure what I'm missing in my tuning, but my firebird doesn't seem to be performing at it's best.

I'm set as follows:
1) stock 400 rotating assembly (68k miles), rebuilt heads w/hardened seats
2) rebuilt quadrajet
3) pertronix(points & condenser replacement), new cap and wires
4) rebuilt stock M40 auto
5) original torque converter
6) 3.08 posi
7) The pontiac blueprinted "068" cam

I'm running a mix of 92 octane and 115 leaded. About 70/30, the timing is set 6 or 8 degrees advanced past 6 degrees BTDC.

The car doesn't bog or hesitate, launches strong with no tire spin & will chirp the gears on occasion. Back tires are P245/60/R14. Seems to me that tire spin should be an issue at WOT from a stop (not that I'm planning on melting them), the transmission also seems to me like it shifts out of first way to early, & under WOT it shifts into 3rd at 4k rpm. Am I expecting too much from this combination or does something stand out as a potential problemm, maybe the torque converter or mechanical advance in the distributor?