Power-Lock sure grip...8 3/4??

Are you talking about a mini spool kit or the rebuild kits for a Power-lock?

The powerlock rebuild kits are about $75 for clutches and steels. If you need everything, side gears, shafts, spiders, etc, then those are $180 + $75 for the clutch pack. New powerlocks are in the $325 range IIRC.