The Gear Drive is a great way to get the most out of your 6.2 Boss motor reliably and with little maintenance. Coupled with a F-1/F-2/F-3 ProCharger, the Gear Drive can support up to 3,200 horsepower. Blower Not included. 
All Gear Drives are built to order with standard configurations that fit most cars. Accessories such as fuel pumps, oil pumps, vacuum pumps and alternator mounts can be added. Fine tuning is possible with easy to change gears and 30 gear ratios available. In addition to the standard configurations, custom configurations are available to fit special applications and to clear steering racks.
Specification:
-Input Shaft Configuration: Isolated 8 pin Shaft and drive plate to mount to harmonic balancer.
-Weight: 32.8
-Rotating Weight: 9.5
-Vertical Configuration Available: Yes
-Gear Width: 0.790"
-Output Configuration: Isolated 6 pin dual key drive hub to mount on F-3
-Output mandrel 1: Included is a Crank speed mandrel to drive pulley(s) for Fuel Pump, and/or Oil pump, and/or Alternator, and/or Vacuum pump. Mandrel has 3 lengths available, standard is for one 1/2 or 3/4 wide pulley.
-Output mandrel 2: Included is an over speed mandrel to drive pulley typically for an Alternator or Vacuum pump. Option for both is available.
-Comes with gear ratio of your specification (several ratios available)
-Accommodates standard crank trigger setups (MSD, Moroso)