Tap and die jury rig of fittings to block off fluid port and get no pressure loss from 120-140psi compressor and banging cap/sides of caliper for about 2 hrs finally got it to move and explode out.
Yep, 427 side oiler with 4 sets of IDA webers waiting its turn to be worked on. Need to replace clutch which requires engine pull based on its Contemporary Motors frame. Will probably be a while since I am focusing on the Mangusta.