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clutching/gearing.

we are headed out to wyo the end of march looking for some high elv. clutching for my 12' SBA with a 146x2 1/2 track. i have an slp pipe and a pcv. my clutching i currently run is only for 0-4000 feet. any input would be great and thank you!!
 
I would drop 4g on the arms. Should be close. Like from 10-66's down to 10-62's. what is in it now?
 
The stock 2.0 clutch chart shows 10-60s from 6-10000 ft. But at 8k they bump up primary spring from120/310 to a 140/330. They also bump sec spring at 8k from 123/203 to a 160/240. Same helix same gearing all elev. if your not changing out your stock springs - if their stock maybe no more than 10-60s. With the higher rate springs-more rpm you might get away with 62 if your making a little more power than stock
 
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