Help: Torque to Linear force conversion

[IceStorm]

Not to hijack the thread but is there a calculator out there that we can punch numbers into to figure this information out.

We are looking at using either 2 mini-cims or 2 full size cims in the 2 cim ball shifter. High gear reduction of 3.667:1 and Low gear reduction of 8.333:1

Are hope is to remove the parts for the high gear and use the low gear to winch back a shooter. also is there any advantages to using a larger or smaller pully on the winch.