Power boosting front only

Sorry guy's. My car is basically a 68 Dart with Aussie front sheet metal.
From Chrysler Australia it was fitted with a dual circuit brake master cylinder, drum rear and non vented solid disc front with a remote power booster fitted at the passenger side of the car and it power boosts the front brakes only.

I've now fitted 300mm vented disc with twin piston callipers up front and single piston caliper disc brake rear from an Aussie 2006 Ford Falcon Turbo. I was going to keep the same dual circuit master cylinder but wasn't sure if I could keep the remote power booster assisting the front only, now that it has rear disc brakes fitted.

Thanks

I don’t see why not. I mean, it’s kind of a strange set up, but it shouldn’t hurt anything. You’ll want to install some kind of adjustable proportioning valve, which may be more important with only the front half of the system boosted.