SKS 850 155 and SBA 800 with 2" Challenger - Clutching for the Snowies

[IFlyEm]

Looking to take a stock 850 SKS 155 and a 800 SWB to the Snowies. Everything is stock minus the 2" challenger. Anyone have any setup experience?

I think the stock setup for the SBA is:
10-66
Gold primary spring
Blue/Black secondary
58/44/.36 Helix

I am thinking just going with w BMP stage 2 kit.

And the 850 SKS 155 is:
10-72
Black Primary
Black Secondary
STR 42 Helix

I think all the SKS needs is to change the clutch weights to 10-66 or 10-68's. I could probably just take the 10-66's off of the SBA and put them on the SKS and that should be good to go. How is the helix on the SKS? Any reason to do a stage II from BMP on the SKS?

Thanks!!