Engine sputtering at about 65

Any other gauges not working?, not reading back.

Pretty much everything on the dash has screwed the pooch. Speedo cable's all whacked, no dashboard lights, no fuel gauge, battery/alt gauge is reading but don't think it's accurate. I have an aftermarket set of 3 mechanical gauges, oil pressure is the only one reading anything.

Like I said before, electrical in this car is a HUGE project and probably one where I will literally have to rewire the whole thing either at once or in stages. I actually found an inline fuse wrapped in aluminum foil (between the battery and through the firewall feeding something inside the car) by total luck, I happened to wiggle the wire and heard it shorting, I'm lucky the whole damn car hadn't gone up in flames. I replaced that with the appropriate fuse and the newer flat blade style fuses and re-ran that line. It still freaks me out.

The previous owner has added electric seats from a pickup and a heavy duty after market radio, my guess is they boogered up **** connecting those things