You provide the information requested to Tony and should be able to set you up with what you need:
Weights, primary spring, Helix, secondary spring, offset alignment bar, shims for weights, shims for secondary clutch plus the technical know how to set it up. He's also enough of a straight shooter that if some existing parts will work he won't try to sell you parts you don't need.
I put his clutching on my new sled without even riding it. Worked from 3000' to 8000' without changing a thing. If I rode one elevation or the other I suppose I could optimise a bit but to have it pull a consistant 8250-8300 at that range of elevation was quite impressive. Belt life and belt heat are pretty impressive too.