This is driving me nuts. Can't figure it out.

Just finished putting in a 383 tuned port and a T56. Pedal was as hard as a rock. Naturally, I assumed it was the booster, and it wasn't holding a vacuum. I replaced the booster with a 4thgen unit using the thirdgen piston assembly.

Brakes STILL as hard as a rock. Somehow the vacuum fitting for the booster got plugged so I cleaned out the booster fitting and I'm now getting 18" of vacuum to the booster at idle. STILL hard as a rock.

I checked the booster and it is working and it is holding vacuum. I cracked the lines at the master to see if it's pushing fluid and it was. I cracked the lines after the prop valve and I also got brake fluid. I checked the brake lines thinking I nudged one during engine installation. One looked out of place, but no kinks or damage. No other issues. Brakes worked like a champ before the drivetrain swap. The one line looked like it was pulled out of place before, not recently...has a 45 degree bend in it that isn't there on my '86 Z... but I am getting fluid out of that caliper and it doesn't stick or bind.

Im running 4thgen pedals with a 4thgen booster with the thirdgen piston and master cylinder now. No difference. Nothing keeping the pedal from moving under the dash. 63000 mile GTA and all the calipers were swapped a few years back. I even swapped the master cylinder...no change. I have a hard time believing that all 4 calipers are froze, it only sat for 2 months waiting for me to swap drivetrains. This is driving me nuts. Any ideas?

 

Bit the bullet and installed my hydraboost today. Hydraboost works fine, but my pedal.is still hard... Any ideas?