I just install my rebuilt 3.0 litre in my 91' Yota 4Runner and in need of instruck-sion on how to properly set the timming to a base line app or to tweak it a bit for performance. I have done the mod to the air box. I cut about a 4" hole in the bottom and raised it aprox. 3/8" more off the inner fender. Have plans for Headers but really right now just need help with the timming..... thankx for any help Fellow 4x4'r from CANADA.