is the 5% overdrive balancer for the l67 8 rib?

The 5% overdrive balancer (L67 race balancer) does support a 8 rib supercharger belt. Our part number for this is PB610. For more information about this item, please refer to the link below.

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/PB607/SubProducts/PB610