I have an extra external balance ATI Super Damper for BB Buick that I would like to sell. Part number #918400. This balancer has a Chevy style hub to accept Chevy style pulleys, crank triggers, etc. I bought it last year and no longer have a need for it. I was told it had dyno time only, as it looks to be in very good condition. These are available new from Jegs for $442. I would like to get $300. Shipping will be UPS from WI, and buyer pays shipping costs. Thanks!!