Unless this FAT company could show me indepth engineering failure analysis concerning the stresses imposed on the crankshaft, I wouldn't touch that mod with a ten foot pole. My experience with many belt driven supercharged engines and the loads imposed on the crank snout tells me that is a failure waiting to happen. The small shaft on the accessory drive was meant to drive an alternator, not a blower. So unless there is some additional support for the shaft and upgrade of the shaft and it's associated drive, it's just a matter of time until failure. I would certainly consult TCM amd ask them what their opinion is? I'll bet they say no dice.