Help with preparing for a swap

[edwinl16]

I will be swapping my lm7 in my '00 silverado for another LM7 out of a '02 silverado.

Is there certain things i need to buy before the swap?
Is there anything I should look out for?
What's the best method?
I've heard you can just pull the tranny/engine in one or is if easier to simply unbolt the bell housing.
Things I might run into?
Just any hints or tips would be great.

That's the truck I'm doing the swap in