Start a new thread with the question. Should be quite simple for the 5.7 as it shares so much more with the 4.3 than the LSx engines.I've been mulling this over myself for quite a while. I want a TPI setup on my 5.7. I've left everything that was stock with the v6 in place until I figure out how to go about incorporating the EVAP system. I didn't know that eliminating it could cause these problems so I know I'll be trying to find an answer also.