Power Disc Brakes not working on hard stop?

For a streeter, I use organic cuz my rotors hardly wear. I got 125000 miles and counting on mine. Those 1970 factory rotors should be good for another 20 years
but, I admit that with 295s on the back and no proportioning, the rear shoes do most of the braking. And yes, I can, lock up the fronts when I need to, but you know, with an 11/1 367 and and a manual trans I also have plenty of compression braking.