looks like you're all set.

I once installed a rear main on a rebuild and it leaked like you're saying. turns out the seal had a small cut in it.

it's just a pain when you have to pull a transmission out for $20 worth of parts and supplies, but you'll be glad once it's done.

so you're sleeving the crank, replacing the seal & rear main cover gasket, correct?

try a FIPG instead of the old permatex RTV -- they make a product called The Right Stuff. it comes in one of those aerosol spray cheese cans, and it's $12, but it's sticky, not slimey, & sets up within 5 minutes, and you can run it as soon as you get it all put back together.