Valve cover gaskets.....Moroso (rubber over steel) I will not waste any more time with cork or rubber.

Rear main seal. Source crank has no knurling on the seal area.Cut the retainer.Use the double lip Viton seal or a rope seal.Black seals are not as pliable as they used to be (Mopar and Fel-pro). Don't forget to seal them on the back side.Offsetting them will also help but I have sealed them either way. Use the side sticks from Hemi-Haynes or stock ones if you can find them.Seal the back of the retainer where the sticks are after everything is set. Do not use the silicone to replace the sticks.