If you can afford it, a factory service manual off eBay would be great. Haynes are OK but GM literature is much better.
As for pulling the motor, just take your time and work slowly. Label everything and put your screws/nuts/small bits into small baggies and label them. When you get the motor out, clean everything as best you can.
When you get the new motor you might as well get it clean too and install new parts whiles its out. Timing chain/gears/dampener, freeze plugs, water pump, etc.