brake problems on conversion!!!

[SixTwo]

We did bleed the MC till it was incredibly hard to push in.
We tested it again by taking it off and caping the front bowl and leaving the rear off. Fluid seemed to barely spit out the back, but if you put your finger over it, after about 3 pumps it would push your finger off and spray a little bit more fluid.
We added about 6 feet of line and I'm wondering if there is just so much empty line that no pressure can build up?

[bikerguy]

Any time you go to bleed the rear brakes and you get at little fluid, generally means you have a lot
of air in the system. You have to keep bleeding until you starting building up pressure. If you cannot get a build up of pressure means there is a opening so where in the system. You need to check all connection, wheel cylinders that a seals have not pop out and brakes adjusted properly. If you decided to use synthetic brake fluid that can created leaks. I would no recommend using synthetic brake fluid.\