AL in NY
Well-known member
Back in the 1960's when I started driving, it was a bi-annual job the replace points, plugs, condenser and rotor every fall and every spring. Then every other year would would drain, flush and refill the cooling system with fresh antifreeze and check all hoses for deterioration. A few years ago, I had my heater core plug up in my 2000 S10 Blazer because I didn't change the Dex-Cool at the recommended interval. There wasn't a problem with the antifreeze, just my absentmindedness because newer cars don't need the same bi-annual attention as my 1960's cars did. I just got too use to NOT servicing it. I don't see a problem using Dex-Cool in your Model A if it's changed a regular intervals.