I am running a star pump and hope for 12-13”. I have tried to address all other areas. Changed the rear main to ptfe double lip. Also change out the jesel cover seals for ptfe double lipped seals up and bottom. Air tight oil fill cap, regulator for vacuum pump is inline by pump(which vacuum pump manufacturer said is preferable). Everything else is rtv sealed and all surfaces were inspected for flatness. The dipstick tube is the flacible type from milodon, i believe.