I'm sorry, but how the hell would this solve anything? The heater cores failed even without a bypass, ford knew that. What makes you think that taking your bypass out is gonna magically unplug it, that obviously didn't work for everyone who didn't have the bypass but had heater core failure anyway. Flush it or replace it. The 3rd option is to go without heat.
I flushed mine with water and compressed air, it worked kind of crappy for the first week, then all of a sudden I started getting pretty good heat, I guess it eventually unclogged itself after blowing compressed air and over like 6 gallons of water through it, but can't remember exactly how much I used. The water JUST from the heater core was all BROWN like the consistency of chocolate milk, only orangeish. There was a crap ton of metal flakes and rust too. If you did get it unplugged, you might have to change the coolant like 3 times to get all the crap out, I sure as hell wouldn't want any of what came out of my heater core running in my engine or rad, if it plugged the core it could plug a coolant passage or the rad, screw that.
Sorry to sound rude, had a long day.