"HPART IS RECTANGULAR AT THE TOP WITH A SLOT 0.560 W X 1.250 L ON CENTER LINE; BOTTOM HAS A 2.760 DIAMETER CUT OUT CENTERED 2.810 INCHES FROM TOP; PART IS ROUNDED OFF ON THE OUTSIDE OF THE BOTTOM HALF OF THIS CIRCULAR CUTOUT, LEAVING A WALL 0.750 IN THICK; 2 HOLES ARE DRILLED THRU FROM THE SIDE, ONE 0.342-0.352 TAP DRILLED THRU, C'BORED 0.56X0.38 DEEP, THREADED 0.3125-18UNC-28 TAP THRU, 1.405 INCH FROM TOP; THE OTHER 0.405-0.415 THRU, 0.560 INCH FROM TOP"