Dreaded Main Seal Leak

[nrgtruck]

My 72 Big Block C-10 has a horrible main seal leak. Someone told me to basically change the bad seal (two piece) is to remove oil pan, take off the main cap, get a Sneaky Pete to slide the seals off while bumping the engine to rotate and then put a little on oil the new seals, press into place and rotate in.

Is it as easy as it sounds? Would I need to drop the tranny to replace the seal?

Thanks for replying.