I have a kiesler tremec setup in my superbird clone I purchased it in 2000. Within months I had the shiftrods fall apart. I had to remove top of trans. They had used drift pins that were to loose. Had to send trans back for warranty work. I bought complete kit including bell housing. Trans shifts like a big truck. Now I guess they have a updated shift tower but keisler has never sent me info so I could solve my problem. I have always had clutch problems. I installed their mccleod clutch first had very high peddle effort and the pressure plate finally failed. They then sold me a diaphram clutch and told remove me to remove the overcenter spring. I never did remove the over center spring because I know how hard they are to replace. I tried to tell them that is the wrong for a mopar but they assured me it would work. If you drive normal it's fine try to shift it under hard acceleration cluth pedal sticks to floor. I have so many other projects at work and at home I just gave up and I've just lived with this for years. But it doesn't work right. I remember when I started this project they tried to talk me into their hyd clutch. Come to find out the first ones were junk. Glad I didn't listen to them on that one. If they have poor engineering they should offer updates to us poor suckers stuck with their junk. I have a gear vendors in my duster that runs 10.30 has been there for 4 years not one problem. I only spent 2300 for it you tell me which is best. Bill