Considering an LS in my GMC - I have a few questions

[CC69Rat]

Let me first say, I have owned a couple Trans Ams, a 1LE Z28, etc. I know the performance of the LS based motors and what they are capable of.

I'm completely new to the codes, year models, etc. I am doing research now .. I just want to ask for differences in opinion. What's the best one to get for overall ease of building, avoiding extra expense for wiring issues, etc. Ex. Find a 2005-2007 Escalade and get .. these parts.

SSR ? GTO ? They're probably all pretty nice in the end, .. but what am I looking for? I'm thinking I'd like to have a GTO swap for the transmission?

Your thoughts please? My truck will be setup with a LOT of suspension goodies, 4 wheel discs, etc. I just need some more HP and reliability, mpg and crap-a-nol compatibility.

Thanks.