I am eventually going to go with a Stage 2 DKM clutch. Rated for 440 ft-lbs to the wheels.
Another thing, IMO people take the ratings too literally. There is a thing engineers use called a safety factor. Definition from wiki:
Factors of safety (FoS), is also known as (and used interchangeably with) safety factor (SF), is a term describing the load carrying capability of a system beyond the expected or actual loads. Essentially, the factor of safety is how much stronger the system is than it needs to be for an intended load.
In other words when a product, building, etc is designed with a safety factor in place (everything is unless you are in China), it is made much stronger than what it needs to handle (or in the cluth's case than what it's official rating is). This minimizes failures and helps avoid liability or in some cases death. That 440 ft-lbs rating is a really really conservative estimate of what that clutch can actually handle. I'm sure it can handle 500 ft-lbs pretty comfortably. The only way I see this clutch not handling what I throw at it is if I drive like a complete idiot (which I don't plan to) because I'm not ever seeing 500 ft-lbs on this car.
