Question for don Scott or DV about Shocks

[4RE KLR]

DV or Don ( or anyone for that matter)

As you both know my car is a Classic Roadsters ( on the cover of KIT CAR 11-2001) . I have a question about the rear suspension. I am very pleased with the way the car handles and rides. However when I have a full tank of fuel and or a passenger, the tires tend to rub when I hit bumps in the road. The tires do not rub when I am in the car by myself with 1/2 tank of fuel or less. The tires do not rub on the inside by the frame or the behind the seat storage area, although they are close they do not rub. They rub the underneath side if the fender in the center of the fender at the very top. As if the car is over loaded with wieght. I will list more info about what I have on the car now, then ask my question.

1988 8.8 factory width axel.
1995 rear disk breaks, this narrowed the axle by 1/2" over all
PS engineering wheels he does the ofsets for our cars
BFG 295 tires
Classic Roadsters springs specs
Classic Roadsters shocks specs, Gabrial cross referance #'ed gas
Spring adjusters are all the way down
The car appears to set right.
The car squats under accelleration BAD.

My question: Can I put adjustable coil over shocks in the place of the standard shocks, then adjust them to suit my comfort and fix the problem. Do I need to remove the Springs all together if I do put on adjustable coil overs, or should I leave them as they are in addition to the coil overs. Will that stop the squatting. And what shock and number would you recommend.

Thanks
4RE KLR
Steve Parks