1972 Front Disc Brake Conversion

Icetech said
No idea, all new stuff.. even put on EBC pads to help.. BUT they have almost no miles on them so far, they "Work" but i wouldn't trust them to panic stop.. going to get them broke in all the way first.. Thing is.. Drums take much less pressure to run (being manual that matters) and discs don't self energize which once again for manual matters.. but i will figure it out. Not sure if the OP is going power or manual is all.

It's possible you haven't bedded in the pads yet, which means you won't be getting the best braking yet. What EBC pads are you running? Because some of their pads are basically race pads and they need to be at temperature to work at the best. And regardless they do have a break in procedure to bed them in.

All of my Mopars have been converted to manual disks, either by upgrading to disks from drums or by removing the power booster from a car that already had power disks. The amount of pedal force you need doesn't tell you how good your brakes actually are. If you lack the leg power to fully apply the manual disks then I suggest you upgrade to power brakes. You may also look into a different sized master cylinder, depending on what you have, to better match the pedal force to the line pressure needed. Personally I don't think that the pedal effort needed to stop an A-body mopar with manual disks is all that high, and for me I find that the brake modulation is better with manual brakes than power, at least with the OE power booster.

Drums self energize, but that makes them very easy to lock up. And locking up your brakes is the slowest way to actually stop.