i have upgrade my 1200 Ute brakes
it has r31 skyline rear calipers and disc and Mazda s6 calipers and disc on front.i am running a (brand new) 240k (7/8)master cylinder and BMW 318i brake booster.
the front brakes run of the booster the rear does not.
There are no leaks that i can find and no fluid anywhere along lines

Now the problem!!!!!!!!!!
i have bench bled the master put it in and bled the system starting with further caliper away to closet.(from the master)

i have a pedal but i have to pump the pedal a few times then i get good pedal and brakes. i leave the pedal for 30 secs and then i have some pedal and some brakes.Also i get a air nose (sounds like coming from master)that only happens when i pump the brakes up but i cant find out where it is cant see or feel.

I was wondering if anyone has had this problem or has any info about what it could be.As i have bled the brakes and there is no air and no real reason why they wont work unless the air noise is the problem......need help badly

ANY INFO WOULD BE A GREAT HELP AS THE CAR IS FINISHED JUST NEED BRAKES TO DRIVE FOR FIRST TIME IN YEARS