Cut a groove for #146 buna O Ring in both oil pump housings so no gaskets will be needed. It will also keep the gear clearance correct. Installed pump with a gasket between body and block and torqued to 14 lbs
O ring cut spec 2.594 to 2.836 .074 to .080 deep .136 to .142 wide
Cutting a .139 wide .076 deep O ring groove in the main pump housing
Gears being lapped for .003 to .004 clearance with 400 paper on a surface plate
