64 (Canadian) Valiant Signet (aka Dart GT) front disc brake conversion

This what I bought for a 71 Demon. small bolt pattern and lets you keep 14" rims. You can buy the kit with power booster or manual. This kit is very complete and comes with a new master which is what you need, expensive but I found it to be a great upgrade.

A153 Front Disc Brake Conversion Kit, Mopar Non Power – SSBC-USA

Nice car!!!