Pulled two out the bottom (last?) week. It was cake. I'll let you guys do the bickering, but throw in a few more sentences or links or pictures to make this thread more of a how-to and less of an abortion.
If dropping it out the bottom, here's a pretty good link I skimmed over before diving in (--I also made sure you give SweetBMXRider a few calls, texts, private messages, instagrams & and at one point there was a Carrier Pigeon involved, but I digress--)
http://ls1tech.com/forums/generation...ne-bottom.html
I highly recommend using 3 dollies; One under each wheel, and the other under the trans. At 9-bucks a pop from Harbor Freight, they're certainly worth it & made it possible to slide the assembly around any way we wanted.
Since we weren't using a lift, putting the rear tires on blocks/ramps also gave more ground clearance.
It was pretty straight forward, for the most part. I plan to dump a keg of anti-seize on everything before re-assembling.
Worst case, you can do as Ls1ow and WildBillyT did when they pulled the motor from his WBT's old catfish.
Best of luck.