I'm no expert on LS based engines but you will need forged blower pistons and a cam with an LSA of like 112-115. The neatest 4L80E I have found is this one:
http://www.tciauto.com/tc/6x-six-spe...e-shifter.html Its what I plan to use as I think a paddle shifter will keep my cab cleaner and let me keep both hands on the wheel. I plan to go with these guys:
http://wrenchrat.com/company/ for my turbo setup.