My 72 duster currently has /6 leaf springs some 90/10 shocks and a pinion snubber. the passenger spring is way too soft and i really dont like the ride quality. i drive the car on the street a lot but also do a lot of drag racing. the car is currently a high 11 second car but future plans to run much faster. probably mid 9s with a new set up. ive been looking at the caltrac rear suspension but ive also been looking at the chassis engineering ladder bar system with an anti roll bar. my car sits very low in the rear end and id like to keep the appearance. what do you guys suggest?