Need help Bad, please

[ubtripn]

This is the order of events:

1. Front brakes and wheel cylinders removed
2. All hardware replaced (Retainer issue fixed)

I had good brake pressure before. (These are power brake drums) but I cannot build pressure back. I have bled them the normal way then gravity bled them with almost half a gallon of fluids, no visible leaks, just cannot get pressure.

Shouldn't I be able to bleed the front end on it's own since it is in a separate loop than the rear?

What else can I do??

Thanks.