Hmmm... just looked up on dragtimes DA calculator. The DA's last night in Englishtown were about (-60 ft) last night, and temps were in the mid 50's. I'd kill for that right now down here in FL!!
But yeah, I'd say there's something wrong with your tune, your car should be running awesome in that weather. For comparison, I think my best trap speed was 107.6 mph in 600ft DA's... ~70 degrees.
Longtubes are on the way huh? Maybe you should try what jnaut did, raise the rev limter to 8000 or 8100 rpm. I think it would make a huge difference now that you have gears done.