I would suggest (cant believe that it hasnt been suggested yet). But I would suggest calling Peter at South Bend Clutch. I called last week to order a clutch for my cousin, he has an '01 with the Edge Comp box on it, fried the stock clutch. Anyways, here is the information that his assistant gave to me (Peter was on Vacation last week):
'01 5-speed MU 13-1. 25 Con OFE
450 Horse
1000 Torque
$1123
'01 5-speed MU 13-1. 25 Con FE
550 Horse
1100 Torque
$1296
-Both Come with Flywheel, with a $300 core
The phone number is 1-800-988-4345
My cousin went with the Bigger of the two the ConFE.
I hope this offends no one, I am in no way associated with South Bend Clutch, as a matter of fact, I am still running my Stock Clutch, with 140K on it!!! Its still making me money, I will use it up untill the truck wont move!!!
Hope this helps guys!!