[Mike Pearson]

Use the spring rate that wil get you to the correct ride height. the springs only hold the car up. The fact that you had better results with a stiff spring prove that the suspension geometry in the car is way out of the ball park. I suggest that you get a magnetic protractor from your local tool or hardware store. Once you have lowered the back of the car then Jack the front of the car up until the rocker panel is perfectly level. Then place the protractor on the lower link bar if the lower bar is lower in the front than at the rear end your problem will be solved. If you can not get any down angle then you could drill a new hole in the rear bracket higher than the original hole. The whole key is the correct geometry and the shock package. You need shocks built specificly for drag racing. double adjustable on all 4 corners. Loose is for slick tracks and tighten up as the conditions will allow both front and rear. With your large displacement engine it makes alot of HP and torque. The chassis will have to be set up nearly perfect before you will be happy. I have built several cars for super stock and all have been set up by this method with excellent results.

Mike