Help my crap 60ft times!

So I went to the track this week for the first time on the new 360 and the best I could get was 12.90 @ 106mph. . . Sad for this motor. I think my biggest problem is that my 60ft times are the same as last year when it ran 14.0's. All night my 60ft's were 1.9X seconds, LAME! I'm lookin for a lot more out of this, tho the car was all over the place I think it shoulda done better, I noticed that with the 3.91 gears I was only at 3800rpm at the top end on a small 255/60/15 drag radial. I'm thinking I'm going to put in the 4.56 gears and try again, this should cut 60ft's and ET's right? Also I know a lot of you run the rancho shocks for length and I think with the way the car lifts my stock shocks are a problem, would a OEM dodge truck shock work as a cheap alternative? And so you know the car uses a 727 with a 10" 3500 stall, super stock springs moved inboard and a pinion snubber set to the floorpan. Thanks for helpin a young gun (20) FABO!

thinking that the pinion snubber on the floor is bad, not letting the rear load for launch. when u "stall" to launch what is it stalling to?

and with 3.91 and that tire u should be way over 3800 rpm