[RICK LAKE]

A98COUPE Stuart You have not said what you are going to do with he car, Road race, auto cross, car shows, cruising, etc... We also don't know your abuse level to the car, Driving like Miss Daisy, Fireball Roberts, Smokey and the What's his name??
I am not a fan of puck discs to start. I tryed one many years ago when they first came out. Some of the problem was breakin, I did about 100 miles and trashed it. Slipping, chattering, banging the drivetrain with hard engagements when clutch was hot. Broke 4 universals and a couple of trannies and transfercases. This was in a CJ5 jeep. Same weight as a cobra with about 50hp and 60 ft of torque less than 452 motor.
I found that going to a higher pressure plate load hold, and staying with a basic organic disc that was truck applied worked the best. Too much abuse the clutch would slip. Allow to cool off and everything was OK again.
I agree with Brent about a twim disc setup. IT has feedback, slips a little on cold takeoff, but overhaul locks the motor to the drivetrain and holds. I break the tires loose before any clutch slipping. The down side FOR ME ONLY is solid hubs on the discs. I like spring hubs that absorb engagement of power shock to drivetrain, yes it's a small loss of power but saves parts.
If you want to go with a single setup and the gearing you have in the car, I would up the pressure plate to the weight of the car, 2,600 pound and stay with a spring hub disc. Modify your driving to smooth on and off the pedal, and roll into and out of the throttle better than what you are doing. This helped me and made my car happier when racing. It takes time, parts breakage is down, tire wear is better, car is happy and going faster than I want. Still working on the man handling problem of myself on the tracks. Hear it comes with time, not.
Side note we didn't fine out what the 1st gear was in the trans?? I have a 3.08 in a TA and ran a 4 spd for years in all weather. Not riding the clutch and downshifts extended the life of it. Ex wife blew up clutch in 2 weeks of her driving it. I went 4 years.
Last note, would go through 3-5 clutches before having to replace a tranny or rearend of the car. Job may not be easier but is alot cheaper. I am happy with streettwin. Been in car for 3 years. Good breakin and 98% track running.Rick L.