Do explain more on this wishbone upper if you can. If you dont mind. Thanks!!!

 

here's another sketch:

Note that sometimes the wishbone is reversed with the center at the crossmember and ends at the axle depending on clearance needs. The center of the V bar could be made so the center pivot was a seperate piece threaded thru it to give still another point of adjustment. The center bushing needs to be a high compliance type (large diameter with thick rubber to allow angular movement and road shock absorbtion. This type suspension has become somewhat the OEM norm (with the angled lower arms) so the parts are readily available at salvage yard.

 

Great sketch AX. I looked at it this morning and have come back to it tonight. I been wondering about the pivot points of the bars. With the center link forward of the 4bar links, would it bind as the suspension travels? Should the bars be more equal in length?

 

I was only trying to sketch the general layout. There is some good inexpensive suspension modeling software and reference books out there or you can build a scale model to play with pivot locations, arm lengths, angles to see what effect they have on the geometry, or you could do it the backyard engineer method, dummy and tack somepices together and move it around. I'd need a lot more info on the actual setup to even start giving measurements and that's more time and work than I have interest in investing in it right now. How much fun would it be if I gave all the answers?
Typically the arms are different lengths and angles from each other. Bind shouldn't be a real issue if you use rubber bushed pivots and limit the range of movement.
Personally if I was dead set on airbags I'd probably have gone with the KISS principle and used a NASCAR long trailing arm, panhard bar setup.