I'm putting a 454 in my car with a ss 700R4 monster trans with external lockup 2500 stall.. 850 holly DPumper.. I was wanting to keep a/c and want to use the stock gauges.. What electrical issues does trashing my ECU pose for me? I'm also unsure of what all exactly runs of the ECU.. This is my first attempt at such a swap.. I've focused on major parts and am now trying to figure out just what glitches I'm going to run into.. Any help anyone?