Forgot.....1956 block with 57 head .....I won't be using the ranco valve. I'll be putting inline shut off valve with cable to dash. We just don't know how the hoses should hook up to heater core. I would think the upper thermostat heater hose should have the inline valve cut in near the fender heater hose retaining clips then onto the LH heater inlet tube....?
Thanks steve