I converted my 41 Plymouth Deluxe to 12v. I purchased a rebuilt carb, Pertronix points and coil, sent the radiator to get cleaned, added an electric fan, flushed the coolant from the system, and my temperature gets to 190+. It iddles rough back fires and bleeds water from the radiator once it heats up and I turned it off. I tried setting the timing and it doesn't back fire as much, but still has all the symptoms I mentioned. The car was not heating up before the convertion, but it was not starting after heating to normal temp. Can someone please assist? It will be very much appreciated it. Thank you.