Farm Truck ran 1/4-Need Help!!!!!

[JReynolds]

Those of you who have been on the board for a while might remember seeing pictures of the "Farm Truck."
I finally went to New England Dragway, and I could only muster a 15.29, but the top speed was at 98 mph.
My wife was watching from the lights, and she said the rearend came off the ground "several inches". I made another pass, and the same thing happened. I've done plenty of burnouts on the street, and have gotton a bit of wheel hop coming out of them, but nothing like this. Guys at the track couldn't believe the speed verses the time, normally that would be a mid 14 second speed. My question is, what can I do about the wheel hop?
The truck has coil spring rear susp. with new KYB gas shocks.
3.07 rearend, 4 speed. The springs are original-heavy duty coil springs. Any help would be great. Thanks>>>>>