It's all straight forward till it comes to getting the top seal out,, you didn't mention year,, if you've got a rope seal,, that can be challenging,, but by your avatar,, the seal should be rubber,, so if you look closely at the ends of the seal,, you'll see a "wire"'' on your old one,, push on the wire, as you rotate the crank in the same direction,, it'll come out enuff to grab with pliers etc,, install it reverse,, making sure the seals "lip" is facing into engine,, refer to old seals direction..
Use weatherstrip glue, or rubber cement to hold the gskts in place,, with a dab of RTV silicone at the corners,, use a hammer to straighten the pans sealing surface, tapping out the mushrooms the bolts tend to make..
hope it helps.. cheers
I'd get laughed outta my own shop if I yanked the engine to do a rear main..lol
and explaining the extra 6 odd hrs. to a customer is outta the question.. lol