Start off, thanks for having me on this forum, I will attempt to contribute where I can. I have lots of experience with the duramax and cummins OS. I enjoy the LS motor quite a bit and many other gas engines. Just picked up an LQ4, stock, 0411pcm 512kb, MAF is still there, no O2's, LC-1 wideband. It's married to a mild TH400 with a reverse pattern valve body and a np208, its all now in my tube chassis 82 cj-5 on 2.5ton rockwells. I have been fooling a bit around with an 02 Camaro manual transmission tune for it, just due to the th400. I do plan on running a bottle down the line and eventually once I get the rest of the parts for the build I will put a blower on it. My question is what are all of your thoughts on the OS, should I just start with a COS or just build off the original tune. Should I retain O2's, keep the MAF, toss the MAF, thoughts, anything to keep the juices flowing here!