I run that set up on a 155. I ran the stock springs and 10-66 polaris weights for that altitude. ran good. on higher elevation pulls rpm would only hit 7900, so leavings performance on the table. my buddy has the exact same setup but left the 10-64 stock weights in. he was pulling 8200 on the same climbs. belt conditions could be different as well though
i just picked up the Carls clutch kit and will be trying that. They said for that set up and situation to run stock springs and 10-66 belly buster weights with their helix