I called them air bags but
I think the book may call them air cylenders. Never the less, there inside the front coil springs and I'm not sure how to replace them? Any advice would be appreciated. Thanks

Take them out through the bottom with a knife and a Vise Grips. A heat gun or propane torch makes the bag softer and easier to pull. If you use a torch, watch the grease.

Clean and smooth the bottom hole with a file and finish with emery cloth to avoid damage to the new bags.

Pick a heated place or a warm day to put in the new ones. Get them warm in hot water and squeeze all the air out of them. I remove the valve core to bind the bag, and replace it when it is tightly bound. Bind them tightly with wire so they will slip through the hole. The warmer they are, the tighter you can bind them and the more easily they will slide up through the hole.