I am trying to tune a 91 Chevy 3500 with a 454 and 4L80. The owner has swapped cam, heads and injectors and added long tube headers. For the life of me I can't seem to find where to change the engine or injector size This is my first time dealing with this ECM, I have previously tuned 7165's, 7730's and a couple others but never this one. I keep telling myself I'm just overlooking them but either they are not there, labeled different than I expect to see or I just need to beg for help. It's been a while since I have so much as opened TunerPro so who knows what my deal is.

Thanks in advance,
Dewayne