I have a 06 F150 SC 4x4 and pull a boat on occasion that has a lot of tongue weight. Does anyone know where I can buy a set of air shocks to level the ride?

 

I would suggest another option. A supplemental air bag system (like the Firestone kit available at 4Wheel Parts) would be a much better option. Your rear shock mounts were not designed to support (or help support) the weight of your truck.

 

Can I use the Firestone kit with a 2 inch lift block? I have the level kit in the front and I added a 2 inch block in the rear.

 

Yeah, it should have no affect,