Originally Posted by Cab_Burge
I completed changing the front coil over springs today, the car is now compressing the 300 lb. spring right at 1.0 inch at rest without me in the car and no fuel in the 7.5 gallon front mounted fuel cell with one full turn preload on these new springs. I'm going to leave there for now and check it again in the spring before I take it out racing with the fuel cell full and my weight in the driver seat luck
The Afco rep said to adjust the preload to get the shock in the middle of the travel, which is 3.0 inch without the rubber bumper installed, 2.5 inch travel with the bumper in place.

Sounds like you need to go down to 250 springs? Better to be able to slow front end rate of rise with the shocks than to have it sprung too stiffly. With a 1.24 60 ft i assume you are running almost 9.0?

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky