Hydraboost - ? about getting it going...

[69MyWay]

Anybody here put a hydraboost off a heavy duty truck on their hot rod?

(Not a hydratech unit, just a unit off a 83 Chevy truck)

I installed one on my 69 Vette. I made sure it mated up to the correct depth piston master cylinder.

So far the brakes don't seem to work. The pedal goes to the floor then kind of kicks back while it is running.

Any special air/bleeding issues with one of these units?

I have had them on 1 ton trucks, motor homes, etc, but never had one off and on before.