I bought a 95 Mustang that origionally had a 3.8 EFI V6 in it.. but the guy swapped a carb'd 5.0 HO V8 into it. Well, the gauges don't work (except for the voltmeter and I believe the gas gauge?).. Where do those gauges read off of? Did tehy go through the PCM.. and in that case, how do I get them to work.. and if they didn't.. waht do they read off of? Because the car didn't have any of the trans sensors connected when I got it.. would that be the speedometer/RPM? Help!