The motor plate should be a "Nominal" thickness of .375 (3/8"), +/- .019 (1/64"), with an i.D. Hole of 6.0", +/- .019 (1/64")
Style was designed to what appeared to be the most common motor plate style currently being used
Design fits is the Chevrolet crank shaft flange bolt pattern of 3.580" diameter
The aluminium "MPD" style bell housing and the steel "DMI" style housing are the only ones where we have physical confirmed the fit. To our knowledge, these comprise the vast majority of the parts in the field, and other bell housings, such as the Winters aluminium bell housing and the DMIÂ aluminium housing appear similar to MPD, however, it is incumbent on the customer to trial fit the parts and confirm the fit. The motor plate should be a "nominal" thickness of .375 (3/8"), +/- .019 (1/64"), with an I.D. hole of 6.0", +/- .019 (1/64"). Plate thicknesses or hole dimensions other than those specified WILL CAUSE PART MALFUNTION.