50 Year Old Chevy El Camino Daily Driver Maintenance

I have been daily driving my 1976 Chevy El Camino Classic everyday. I commute to work in it, run errands, and even take it on occasional road trips. It's been very reliable, but I have some things I need to do to keep it reliable. I also have a couple problems with the car that cause problems for daily driving. Follow along as I do an oil change, change the belts, and inspect the spark plugs. And, I try to figure out where my coolant is vanishing to and a battery drain that happens if the car sits for a few days.