So I bought a Tremec T56 transmission for my 1967 Camaro.  This is the clutch that came with the transmission. I believe it's the 550hp version as Hurst Driveline only sells a few upgrades to the standard clutch that comes with the transmission. One thing leads to another and I end up replacing the engine too. I bought a Chevy Performance Engine ZZ502 502 hp. Hurst claims the clutch is strong enough. NOT!!!  So I replaced with a new HD clutch and all is good. Now I need to sell this one. Has an 11' diameter and will fit 26 spline shaft. My loss will be someone else's gain. Make me an offer if interested. Thanks for looking!