Opinions on universal or wilwood brake pedal conversion.

Power and manual brake cars used the same pedals.

Personally before you do much of anything I would mount the master cylinder properly. What you've got there is a disaster. The master cylinder should be bolted straight to the firewall. You're using a 2 bolt master cylinder, which is fine, so I would get an adaptor bracket from DoctorDiff. Mopar Master Cylinder Adapter. Then you'd need a manual m/c pushrod, or just run an adjustable Mopar '62 -'70 Adjustable Master Cylinder Push Rod

From there I'd just replace the factory pedal. It doesn't have bad geometry if everything is mounted properly.

The problem with the aftermarket pedal set ups is that you have to re-engineer the whole mounting bracket, which also serves as the mounting bracket for the steering column. Either that or modify the new brake pedal bracket to fit inside the factory bracket. Either way you're in fabrication land. You could also hang an aftermarket pedal from the factory bracket, but then you may have geometry issues again.

If you need a factory brake pedal, I've got one for an automatic car. Probably have the whole bracket too.