All I can add is I have a 65 dart with 74 A discs w semi metallic pads and 10" drums with parts house cheap linings on a 7&1/4" and a large bore alum M/C (1&1/8 iirc) and I plumbed it into the OE 9" 4 wheel drum splitter and I have no issues. On paper everything is wrong here. Stops good/no excessive front pad or rotor wear/pedal effort not bad & rears locked up once when I was paying more attention to the eye candy on the sidewalk than to the distance to the car in front of me. I do drive everyday but I concede the speeds around Lincoln are pretty tame so in a more agressive environment I may have probs. I had read once that a metering valve is good as it holds off psi to the front till the rear drums pretty much make contact to lessen excessive front pad wear but I have not had a prob. I would add a adj prop valve in the rear or smaller cyls if I was starting from scratch & wanted less (rear) lockup. Not trying to add fuel to the fire just relating my personal experiences with this