I am a auto tech and new to the tuning side. I am looking for good tuning guides websites or magazines. I bought the 6-speed trans tuning guide from the tuning school it is ok but tells u what to do step by step dosent really explain why or tell what happens if u set it the opposite way. I got the master gm efi tuner book it seems to be mostly theory and how a engine works and definitions. I will be tuning a few drag race cars and mostly stock trucks.