Full Air Ride (without 4 link) configuration???

[asmith1923]

I have a 2011 F350 Crew Cab Long Bed 4x4 with a 6.7 diesel. I use this truck as a daily driver and for towing (13,000 lbs fifth wheel and bumper pull) and hauling 4000 lbs.

The suspension while unloaded is horrible and stance is way to high. What I'd like to do is the following WITHOUT sacrificing the trucks hauling and towing capabilities.

Rear
Remove the 3 1/2" leaf spring block and replace with 1"
Remove as many leaf springs as possible (without converting to a 4 link setup)
Remove bump stops
Install AirBag

Front
Remove Coil springs
Remove bump stops
Install AirBag

1 - I want to be able to lower the truck to the frame while parked (for loading and good looks).
2 - I'd like to be able to set it at a pre-determinded height (lower and level than stock) unloaded for daily driving with a drastically improved ride.
3 - I'd like to be able to raise it up to allow for towing and hauling.
4 - From "slammed" height, I'd like to be able to raise it to the max height in about 3 seconds or less from stored air only (without having the compressors kick in).

My truck's specs
Empty Weight 6504
Payload 4000
GVWR 10504
Towing Bumper 14000
Towing Fifth Wheel 15700
Front Axle Rating 6000
Rear Axle Rating 7200

Do I need to replace my shocks? What bags, tank capacity, compressor, valves and air line sizing do you recommend and why?

[Dieseldawg2010]

Call Kelderman Air Suspenssions.