upgrade master brake cylinder

I think the 1-1/32" bore Dr Diff is the same PN used in 1980's Dodge pickups. But, for disk brakes w/o a booster, you definitely want the 15/16" bore and Dr Diff has those custom made. If you desire even smaller, I use the 1995-99 MC for a Breeze/Stratus/Cirrus w/ ABS (2 ports) w/ 7/8" bore. Search for my post w/ photos. The pedal wound up in the same place in my 1964 Valiant w/ manual brakes. For all, you need the 2-to-4 bolt adapter plate, which you can buy separately from Dr Diff or on ebay (~$30). You can wire the low-reservor warning switch to your dash lamp, in parallel with the e-brake switch. If either shorts to ground, the lamp lights.