Right Stuff and Ultra-Black are the ultimate sealers. Never had a leak when using that stuff on surfaces that are supposed to have sealer on them. Use it in the rear main cavities and where the front cover and rear main meet the block (very thin smear) for the pan, just use a dry thick cork gasket that some of the vendors sell.
If you get a rubber Fel-pro pan gasket, make sure there is obsolutely no oil on any surface, wipe it 1000 times with carb cleaner or equivalent...and do not over tighten any nuts or the rubber will leak....but I'd get the cork one if you can wait to get it from a vendor.
Tie the gasket to the pan in several places with some light string..that will help keep it in place while putting the pan back up...the rear you'll have to leave in the pan till its up then reach in a pull it out...unless the motor is out or the tranny is not bolted up. Once you get a few bolts strarted/threaded on, cut the string and remove the ties/string.
