I'm hesitant cuz I have no first hand exp with 4 wheel discs (yet,got several planned) just what I read here. I did have a 1&1/8 alum dual bowl (w plastic reservoir) on a 65 dart with '76 A (2.75") calipers up front (ceramic iirc pads) & 10" drums on the rear with the OE drum splitter which means no proportioning & it stopped flawless but that was slow everyday driving around town & it would lockup the rears first if I hit em hard. A mismatch on paper but zero issues & no detectable pad wear either. I'd CONFIRM there's no air in the MC (first) or the corners (calipers can be tough to air out completely) then get the biggest bore MC I could find