I'm getting ready to do a ladder bar set up in my duster, getting rid of the complete Calvert setup just for more consistency, have all the parts including QA1 double adjustable coil overs, haven't gotten the springs yet. Just curious what people are using for a spring weight? The car is small block powered and launches with a tranz brake at 3500 rpm, runs mid to low 10's. Weight of the car on the starting line is 3130. Thanks in advance!