I do use stabil in anything that will sit for much time. But the sea foam on the Dart was dramatic. It ran ok but had at least one ticking lifter and burned oil. Which I assumed was stuck rings because it is a low mile engine. I changed the oil, added sea foam to the oil, also in the fuel, then fogged the engine with the aerosol. Let it sit for overnight. Fire it back up, let it smoke and drove about 100 miles. Changed oil and it was black as ink. No more burning oil, no more ticking lifters.
Also a 4 speed, and yes it boogies. Fun car. The guy bought it in 73, drag raced it until 79, then moved to Alaska and put it in storage until this summer he took it out to sell.