Voltage drop with when ignition on

No idea when it started. I parked it 6 months ago to pull the power steering gear box and rebuild it to stop a leak. It turned into a fiasco with a broken header stud and I had to pull the head. Fast forward later. Got the car started and idles and runs fine, "Cool time to put the Holley Sniper on." Got it almost finished up when I'm just looking for a 12v ignition switch that stays on before, during and after cranking when I found that wires that are supposed to be 12v or now at 9.8. Que a storm of the loudest f-bomb I can muster. I have no idea what my next move should be.