Air bag suspension on 95 suburban chassis

[Buick50]

Hello guys im new here. I need some help. Im restoring a 1950 Buick Convertible, I remove the original chassis and I adapt a 2wd 1995 Suburban chassis which I think is very much the same like a 95 truck.

Im installing a LS1 and 4L60e combo with the rear end of a 1998 camaro on it.

Im thinking on using air bag suspension, to make it handle and sit at right height.

I have no experience with air suspension and have some questions:

1. Where is a good place to buy a kit for my aplication, good quality and good price? I contact a company BC Fabrication any comments?

2. what is better to use manual or electic valves? I really no matter about how fast the car is going up and down, just want something that last and make no problems.

3. Air bag suspension always have leaks problems?

thanks for the help and any advices