Well, I did my swap first. I had a couple attempted/aborted swaps to look at, but no one else had taken this as far as I did. I also didn't know as much about all of the subtle differences in the various LS engines. I didn't realize that LS1/6, LS2, and LS3/4/7 used three different sized injectors until it was too late. David and others learned from this thread before trying several different things. You can use LS1/6 injectors, but they have different specs. David is only tuned with Diablo, which only has access to IFR and not all of the offsets and timings that account for non-linearities in injector performance. He has all of that error baked into his MAF transfer function, which I would argue is bad on several levels. It does still work though. If you have HP Tuners than using LS1/6 injectors is not as much of an issue. Regardless, I'm using drop in LS3 injectors now because of where my camshaft has placed my torque curve. I couldn't use LS1/6 injectors either, so I would have had to replace those injectors eventually anyway.