As my Atari 1200XL is pretty rare, and in need of minor keyboard repair, I have decided not to use it to power this project. I may add it in some day for use at car shows, but I want to make sure I have something more reliable and less valuable for every day use. I really want to go 8-bit on this, as that is what would have been common at the time this truck was made. I will be designing this in multiple stages. First will be using an Arduino Mega just to make sure I get something monitoring the engine as fast as I can. Then I will probably switch it over to use the RC2014 Z80 system to get an 8-bit, period correct system in right away, then I will build something custom and etch my own PCBs and put it all together. Very busy these days, can't spare the time or money to knock this all out any time soon.