Potential Free Mods

[I hate Rice]

Ok while I was checking out the electrical diagrams for a typical mod motor I came up with two questions. One is for the resitor in the intake air temp mod. Does a greater resistance equate to a greater advance in timing, and has anybody done this on a96-98 mod motor. I know it shouldnt make a difference on what year but I am just worried about knock. The second question I stumbled accross is, What is the octane adjust plug? Does it tell the computer what octane is being used or supposed to be used. What would happen if you changed that. Personally I dont know too much about the computer and its stock programming and I was hoping some one else could help me out. Thank you