Do not use any gasket sealer, only use the gasket. You don,t want any sealer around the gears. Have the pump surface plate resurfaced. I used a piece of flat thick glass as a flat surface and lapped the housing. YOU HAVE TO MAKE SURE the glass surface is flat when lapping. The resurface pump housing will boost your oil pressure. Hope this helps
PS. Use a figure 8 lapping motion with 320- 400 wet sand paper with WD 40 as a lube.