I have a 99 S10 2.2 that I wanted to tweak a little, but after going over the .tun file there isn't much there. I have a couple of extra brand new turbos sitting around that I was going to slap on and run until I do an LSX swap in a year or two. There just doesn't seem to be much in the way of changing items in the fueling like injector flow rates and such. Can I use a custom OS on this ECM to change different perameters?

The only vehicles I've tuned are GenIII and GenIV V-8s, so this seemed odd to have so little in each section.

File attached for anyone willing to help. Thanks in advance.
99 S10 stock tune.tun