I got this in a package deal with some other parts I purchased for my car, but I don't need this item. I am pretty positive it is a kickdown switch for a 64 ST400 transmission. They came behind the 300 engines as well as the 401 and 425 engines, but I am not sure which engine this one fits. If anyone can tell, please chime in as to which it is. I will take $20 for it plus $5.95 for shipping in a small USPS flat rate shipping box.