Chris,
How did you install Air Lift shocks into your Van?
I went through the Gabriel shock book 4 times, and measured and fit, but
to no avail---the shocks were to big in diameter to fit between the
mounts and the inner fender well.
Another question---
How could air shift from side to side, when they are both holding the
same air pressure?
Been using air shocks,& air bags for years, and they have always been
connected together, so they would be exactly equal, in pressure.
Cadillac Fleetwood's  have been using a load levelling  air shock for
years, and they are always tied together to keep the rear end of the car
level.
Interesting concept, but bizarre.
I tied my air lines to my bags together, and they work fine.
Later,

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Terry 85 GL