For the longest time I resisted removeing or disconnecting the computer on my '83. The wireing diagrams were a little confusing. It looked like it might be connected to the transmission and maybe a solinoid for the EGR. But what I had was not the big ECM, but only the earlier ESC. So, what I found was only 7 wires going to the computer from it's wiring harness and 9 on the other end. A ground wire to the fire wall, 4 wires going to the original esc/hei distrubutor (which I have already replaced with a normal HEI), a wire for the spark knock sensor, two wires for the "tip-in vacuum switch", a pink wire that buddied up with the hot pink wire feeding the bat terminal on the dist. And all of that crap is only to work the distributor. I suppose to retard the spark at certain mysterious and unknown times. So, getting rid of the esc computor is not a big deal. I wish I had done it a long time ago. My truck runs a little better now. If you still have your esc/hei distributor and want to run it with out the computor there is a site that explians how: http://www.73-87.com/7387garage/drivetrain/escrepl.htm I still don't know where the wire going to the EGR solinoid goes to and why, but it hasn't worked in years and I just got rid of it and moved that part of the harness to the back where I don't have to look at it anymore.