60L80E, air suspension, and a general question

[The Professional]

Just trying to get some facts straight. Hope you guys can help.

Is the 60L80E a plug-and-play type transmission for the pre-2008? Are there other things that need to be addressed when doing this swap?

I do not tow/haul that often but when I do it can be moderately heavy. Seems like every page has 1 or 2 threads about air suspension issues. The truck will be used as a utility vehicle seeing off and on road conditions, in the mountains. Keeping that in mind and my tow/hauling habits, what is the populace opinion on the air suspension, in my case?

I'm assuming the 6l output could be made to mimic the 6.2l. Is this correct?

I'm simply trying to get a sense of what it would take to fill the gap between performance in the pre-2008 and 2008 so that I can see where the better deal is. The interior change is a moot point for me. Both are nice imo.

Keep in mind, I'm good with a wrench and most work would be done by me. Thanks everyone.