I am going to install a new clutch kit in my 79 Z. I have what I believe to be clutch shudder on a new LuK 04-020 clutch kit. It lasted about 200 miles and now I have a shudder when taking off that is worse after driving a little and things get warmed up. This all started after I had found that the spring on the clutch fork was broken. I replaced it, drove it and then I started getting the clutch burning smell. I had a shop do some adjusting but I still have the shudder so I'm just going to replace it. The flywheel is also brand new. I have since read that the throwout bearing is junk and I should have bought one from GM instead of using the plastic one from the LuK kit. I am leaning towards the Centerforce Dual Friction clutch but have read good and bad things about those as well. Specifically the weights coming off. Jegs Part Number: 183-KDF485216 My question is which clutch kit is recommended? I don't mind spending the extra money on the Centerforce if it will fix the issue once and for all and last. Oh and I doubt I'll do anything more that drive it on the street. Around 450hp. Thanks in advance!