‘66 Barracuda Brakes Suck — Proportioning Valve Maybe?

I'm in the process of changing to a KH brake setup on my 66....for the same reason, stopping sucks.

Well, no power brakes. Changing the MC as well, but with a standard modern proportioning valve. I've done the same process for my 66 Coronet, it seems fine. Perhaps replacing a 50 year old proportioning valve, is what you need. Cheap thing to do