I have a 69 400 car with power disc brakes .ive bled brakes a million times but i am seeming to have trouble with getting this system to bleed the air out.at first i thought i had a restriction in the lines so I air checked all the lines so i thought it was my master cylinder.so i got another master bench bled it and put it on and still am having troubles both at the front and rear corners.there are no restrictions at the metering valve,proportionig valve the rear metering block,line lock (aftermarket),or lines but it still will not gravity bleed at all.Tell me im missing something obvious i talk to my co-workers at the dealership and they wanted me to check all the things that ive already checked.im almost to the point of insanity.anyone have a pearl of wisdom or a similar experience with these early disc brake systems.i'd appreciate some info. [img]http://J:\DCIM\101_SONY[/img]