I'm selling this on ebay because I decided to go with a different ratio. It's a brand new in the box, matching ring and pinion, 4.11 ratio Richmond Gear set. Its for a ford 8" rear which is the V-8 rear for most 60s mustangs and other ford cars from that era. I paid $165 from Summit plus handling. Starting bid is $100. Here is the link.
eBay Motors: Ford 8" Ring and Pinion Richmond Gear 4.11:1 Rear End (item 140003348037 end time Jul-10-06 12:44:17 PDT)