Most I've measured were about 12.00" long, routing of the drain hoses down through the various engine componants varied but usually routed straight down in front of the heads (on Hemis anyway). Here is an original bubble & hoses that shows what they look like. FWIW this is a VERY original "survivor" quality 1971 setup that has never been restored, all original paint, etc. it's shown here on a 1970 Cuda.