parking brake

I'm needing some input as to what all is needed for the parking brake to function properly after installing the new retrofit brackets from https://www.mustangsteve.com/cobrabrakeshtml/ and calipers on my 9in. It came from factory with disc brakes (Lincoln Versailles) mounted. I've seen you're...

On my 1999 Mustang GT (Convertible), you need to engage the E-Brake which will then trigger the dashboard parking brake light to go on, and once it's on, the top can go down, or up. However, the assembly has been failing about 9 out of 10 times and I need to try to pull it up, release it, repeat...