An even bead of RTV sealant will ensure a leak-proof new retainer/tailhousing. I have greased the new seal lip and used Loctite 242 on the bolts threads. Carefully align the oil pump tangs with the new tailhousing's flanges. You may need to rotate the pump slightly, but be certain not to dislodge the pump from the oil pickup tube. Align the retainer with the bolts, keeping all parts square, and tighten the bolts evenly and in cross. The final torque specifications are in the Advance Adapters instructions.