Just pulled the new 400 engine out of my 78 ta because of an oil leak. I think it was the pan gasket but since I have it out I'm replacing the rear main as well. The builder used the BOP engineering 2 piece rear main since they are supposed to be better. So I ordered another from BOP as well as the other gaskets. I have the rear main out already by simply loosening the main caps a tad and pushing the upper seal half around the crank. Pretty easy. My question is when I roll my new seal into the slot in the block should I put some sealer on the outer side of the seal where it seats in the block or just use a skiff of oil on the outer part of the seal so it slides in the block easy? I know I need some sealer on the seal ends where the upper and lower part of the seal meets. Just wasn't sure if I should put some on the other part of the seal where it sets in the block and in the main cap.