I talked with both vendors (American Classic and classic parts)and the only heater control valve they offer has a 5/8" inlet and a 5/8 outlet. The ones in my heater core are 3/4" therefore to use these i would need to reduce it inside the heater box and I do not believe there is enough room for that. Curious if someone might have had the same trouble. otherwise I believe Squeeze might have he answer that will be the least headache.
