Something I always thought would work that I wanted to try is......... a small barrel valve or even a little needle valve in line on the vacuum hoses.
Would make the bleeds totally tunable with the turn of a knob.
You would just need to make them all a little oversized then adjust down.

70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!