SSBC disc brakes won't stop

Another thing I just noticed when I tried the front brakes again with the backs isolated. The front don't lock up even jamming on them. Mmaybe the MC isn't putting out enough pressure??? IDK?
Obviously... or the front pads are contaminated. Did you:
- Wash off the front rotors and pads completely and thoroughly with Brakeleen before assembling, and keep all grease and oil off of them?
- Is you pedal rod the original and is the brake pedal coming all the way back when released?
- Did you have the added prop valve fully screwed in?
- Are the bleeders pointing up on all 4 calipers?
If all the above is OK, then you may have air in the MC.
- When you changed the rear brakes, did the fluid all drain out of the front chamber in the MC?

When you bleed the rears, it is going take a LOT of brake fluid to get all the air out. It would not shock me for you to have used a quart or more in the whole bleeding process.