Try removing the brake fluid sender that is part of the brake proportional valve, then bleed the brakes again. That worked wonders on my '75 CJ5.
You might want to pickup a vacum bleeder ($30). These things work great, just dont drain the Master Cylinder dry. It's very easy to do.
The cheap way is to gravity bleed, just open all of the bleeder screws and let it go for 30 min. Just dont drain the Master Cylinder dry.