I'm not sure what those ratings are for, and I'm too lazy to look it up on their site. 
But I would go with an ACT S/S disc with an 'Xtreme' PP. I ran a S/S disc with their S/S PP for about 30k miles and finally bent half the springs in the PP on a high rev low speed 2-3 shift. (spinning through first and second) The disc still had plenty of life left in it. The PP just crapped out on me.
Now I run the 'xtreme' pp with their s/s disc and am very happy with it.
250+whp & 175ft/lbs.
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Josh
AE - "The most incomprehensible thing about the world is that it is comprehensible."
