Quote Originally Posted by S10LS View Post
2007 up lu3 is 58x. Didnt see that posted yet.

I think most everything GM is 58x now, I'm pretty sure that happened around 2007. I'm mainly looking at 24x, specifically the 0411 because it is so well supported, and because I don't care for DBW throttle. Something someone with a test bench may be able to try is just changing the cylinder count on an LS1 file and seeing if it still fires.