I did the swap on my 01. I used Wix 33737 Corvette filter to adapt return style to the returnless rails. I used nnbs rails and injectors, and used some injector plug adapters. I also cut the stock map sensor wires and wired in the nnbs pigtail and used that map sensor and hold down clip. I deleted Evap since it's not really necessary. I also modified the stock cable bracket to work with the new intake. I used stock throttle body with FAST adapter and I would highly recommend this setup as I experienced gains at all rpms unlike the torque loss I've heard from some people. I can explain why If necessary.
Check out my build thread for more info on the swap. I believe it starts on page 8.
http://www.fullsizechevy.com/forum/...s/497047-low97tahoes-new-01-ecsb-build-8.html
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