Here is a neat part set that we just got in. We just got a few, but more will be arriving. This hose set includes the upper and lower radiator hoses along with the bypass hose. It will fit most 65-69 Mustangs with the bolt in radiator and small block (260, 289, 302) engine.
These are nylon reinforced black silicone hoses. Silicone lasts longer and has a higher burst pressure than regular rubber hoses. Lower hose also has a stainless steel spring.
These silicone hoses have been very popular on late model Mustangs, and now you can get them for your early model.