quote:the brake pedal would just go all the way to the floor with only mild
resistance, while making a swooshing or mechanical wheezing sound.
These sounds are probably from the brake booster and do not indicate a problem with the booster.
Have you checked the length of the master cyl pushrod? It may be adjusted too short.
I have found that on the Hall modified front calipers, sometimes air can get trapped under the upper hex head bolt (top bolt, as installed) that is used to plug the original brake line entry point. Loosening the bolt will bleed the air, but the copper washer may not seal. The washer on mine was quite thin and would not seal completely even after I annealed it, so I had to find a new one at the auto parts store. The new one was thicker which is OK. Your idea of moving the caliper to a different position has worked for me.
John