I have a gasoline big block eng in the van. There is a cylinder directly under the the brake pedal with a single line coming from the bottom from it which continues along the rail. There are two vacumn tanks, both attached to the right rail of the truck that are part of the brake system. The truck runs fine by after sitting for two years the brake pedal goes to the floor. I can't find a place to put in the brake fluid and a way of bleeding any air off. Thank you