MSD Tach Drive Adapter - Tang to Square Drive Fresh Air System Motor This Power Grid module does

This Power Grid module does exactly as its name sugests

375 (3/8") higher than stock

with laser-cut CNC-formed 3/16-inch steel plate

875 Stroke

The fasteners and hardware are made of steel with a variety of finishes--including cadmium plating

MSD Tach Drive Adapter - Tang to Square Drive Fresh Air System Motor This Power Grid module doesThe standard tach drive for MSD Tach Drive Distributors is a 3 16" tang drive cable. In most cases, this type drive will work, but for those who require the 0. 104" square drive (Corvette style), MSD offers a Tang to Square Drive Adapter to fit all MSD Distributors. The standard tach drive for MSD Tach Drive Distributors is a 3 16" tang drive cable. In most cases this type of drive will work, but for those who require the 0. 104" square drive