Could go local with Tampa Clutch Supply. Their 4 pucks are rated at 500 or 550, I forget. Apparently my last two were destroyed in all likelihood by a new manual clutch cable. I swapped in in the original (21 year old) self adjusting cable and haven't had any complaints. If you go that cheaper route make sure you try the disc on the tranny shaft, they once gave me one with a different spline count.