So I read this article:

http://www.ls1truck.com/forums/front...rans-swap.html

and I am unclear on 2 things.

1-I have an '06 Silverado (not an Avalanche), what do I do about the driveshaft? Do I take it to a local shop, have it shortened and a yoke for an 80 installed? What about the larger output shaft on the 80? Can I buy a driveshaft for an HD with yokes that will plug right in?
2-How exactly do I plug the 80 into the harness, being that my truck came with a 60?