Square O-Ring used with Moroso Oil Filter Bypass Plates.
MOROSO 97321 Square O-Ring
Moroso Replacement Copper Drain Plug Washers 1/2" I.D. x 7/8" O.D. 10 pcs 97010
Moroso Carburetor Adapter Spread Bore To Square Bore Intake P/N 64960
Moroso 65030 Carburetor Wedge Plate Spacer 5 Degree Square Spread Bore
Moroso Carburetor Adapter Holley 2 Barrel To Square Bore P/N 64964