Nitro Gear & Axle's new 3.23:1 ring and pinion gear set is the aftermarket's first one that'll fit inside the 1961-69 vintage "742"-case 8 3/4-inch rear ends. (Until now, 3.55's have been the most streetable aftermarket gear set you could find for that case, known for its large-- 1 3/4-inch diameter--pinion.)
The ring and pinion gears are made of better-than-OEM steels, then machined, heat-treated and lapped using state-of-the-art equipment, and then thoroughly inspected before they're shipped to you, ready to install.
Got a "489" or a "741" 8 3/4-inch rear end? Nitro Gear & Axle has ring and pinion sets, and install kits, for them, too.
MORE INFO: Nitro Gear & Axle, www.nitro-gear.com
GET IT: www.justdifferentials.com (Nitro Axle & Gear's US distributor)
(Courtesy Nitro Gear & Axle)