Heater core bypass valves?

[rusty ol ranger]

86 Bronco II

My blend door lever is broke tottally.

I was pulling dash to replace the box but i have a question...

If i set the blend door to heat and install a couple shut off valves on the heater hoses....would i need to install some kind of bypass for when the valves are closed?

 

[rumblecloud]

If you did have to do a bypass you could prolly rig something using like a 3-way ball valve? But then I'm not sure where you would install them. Easiest is under the hood but then...

 

[rusty ol ranger]

If you did have to do a bypass you could prolly rig something using like a 3-way ball valve? But then I'm not sure where you would install them. Easiest is under the hood but then...

I found a cable operated one....im wondering if i can rig it up to the factory controls...

Heater Bypass Valve Kit - Cable Operated #50-1553 | eBay

Old Air Products Heater Bypass Valve Kit - Cable Operated. Heater valve fits 5/8" heater hose, with sleeve adapters for 3/4" heater hose applications.

www.ebay.com