All the info so far is great, Thanks, But Back to the original question, Car is a 4000lb 68 Plymouth b body, 18 Spline A833 with a Centerforce II Pressure Plates CFT361800 with an original steel flywheel and a 384071 Clutch Disc, 420HP to the rear tires(slicks) with a 4.10 Dana that I don't drive on the street? From the info so far I'm thinking I need to get away from the Centerforce and a different Disc.
Sounds like I need a clutch that's going to slip some to not shock the car so bad. Do I NEED an adjustable clutch or is there a NON adjustable clutch that would be good for my above application? What Disc to use? What Flywheel to use? Thanks again