-I met a fellow B-body guy at New England Dragway today. He is preparing to do this mod to his wagon. I told him how I solved the problem of connecting the AirLift bag fittings to the existing plastic tubing in the OEM system. He showed me some fittings I had never seen or heard of before: Instant Push-To-Connect tube fittings.
Go to McMaster-Carr
and visit the catalogue section beginning on page 135. Super quick to install, super quick to ***-assemble. Specs seem right for our needs.
They are definitely not free, but definitely worth a peak.
Thanks to Jason Doughty for this idea.