Seems a little slow...

I've been duking it out with this car ever since I built the 318 for it and it just doesn't seem to perform as well as I think it should. I'm ripping my hair out and am about ready to sell it off. Please give me some ideas as far as what to look for or if what I think it should run is way off.

I'm thinking this thing should click off at least mid- to low-13s all day long.

The engine:
318 .030 over, KB399 pistons, Eagle SIR rods, forged crank, windage tray
J heads, 2.02/1.60 valves, well ported by Aerohead, 1 5/8 Hedman headers
Comp 282 solid cam, 236* @ .050", .528" lift with Hughes 1.6 rockers
Weiand Action Plus intake, port matched, 750HP Holley DP, 1" 4-hole spacer
viscous fan, belt driven water pump and power steering
Mallory 110 electric fuel pump, stock tank, 1/2" line in the tank all the way to the carb, non-return

The drivetrain:
stock 727, TCI valve body, with PTC 9.5" converter, brake stalls at 35-3600
3.91 with sure grip, 235/60-14 M&H Muscle Car D.O.T. Drag Tires, about 25-26" tall...all I could find for 14" rims

Chassis:
SS leaf springs, pinion snubber, no frame connectors
weighs 3600 with a full tank and me in the seat

Best run:
60: 2.079
330: 5.794
1/8: 8.819
MPH: 81.78
1000: 11.442
1/4: 13.657
MPH: 102.05

This run was with a Victor 340 with the same 750 Holley and the 60' is typcial. I've never seen a 60' time below 1.95 and the tires don't spin. Fuel pressure is set at 6.5 psi and it holds above 5 psi through the traps.

It may also be worth noting that I've run this car with 4.88 gears before. It ran about the same with no noticable change in any of the times or MPH and didn't touch the rev limiter, which is set at 7200.

I took it to the track last weekend after throwing the dual plane on it and the best I could get out of it was a 13.8 @ 98 mph with open pipes.

I was talking with my dad about it, he thinks it may be a fuel problem or the converter's bad. At this point, I don't want to throw any more money at it without a decent plan. Help!