Just thought I'd updaate this in case anyone else could use this info. After endless searching and many breakdowns I came up for a fix for the numorous sinking floats in my carb.I bought a tank sending unit float for a 66 Mustang and transfered the needle valve tab from the original float to it.The Mustang float is the same diamenter and about 1/2 inch shorter in length than the original but seems to work fine. Now I can move on to something else like maybe driving the ol' coupe.