You should be able to buy a spacer kit for your airbags so you can level the rear without running a ton of air, should be able to get that perfect stance while towing and enjoy riding on air with a firm ride.

 

 

You need Daystar Cradles, they do exactly what you are looking for. Stacking blocks is a really bad idea.

Daystar? - Driven by Design

 

Summit Racing has some spacers that are supposedly from AirLift and look to be the same diameter as the bags and just bolt up to the bottom of the bags. They come in 2"-4" and I want to say 6" kits but the spacers are just 1" blocks.

Stacking blocks is not the greatest thing, in fact it's pretty bad honestly. I would be looking at something different if it was me.

 

Tricon, you're respected on this sight and I'm not questioning your's and MiniWilly's know how but here is some of my reasoning in just adding a 1 inch spacer block. I originally got the idea from Ford themselves. They experienced a lot of left leaning rear ends and their fix was a 1/2 to 3/4 inch spacer which is supposed to go along with a 3 7/8 inch factory block (05 f350). I figured 1/4 more inch wouldn't be a big deal.
Also, Rough Country does exactly what I want to do too for their 08 F150 level kit. They add a 1 inch spacer block to stack with the factory block if the customer wants to maintain a bit of rake.
Hear are the links. What do you think? I'd never would try and stack two, let's say, 3 inch blocks together but would there actually be that much force on a 1 inch solid spacer block below a 3 inch factory block. I'll probably abort what I want to do but it really seams like my only option to maintain good ride quality and lift only 1 inch with my current air bag system that has jounce bumpers inside of them (they are like bump stops). The positioning of these bags is critical as not to constantly hit those jounce bumpers.
Here are the links I was talking about. I'd like to hear your feedback. Thanks
2.5in Leveling Lift Kit for 04-08 Ford F-150 Pickup Rough Country Suspension Systems®

 

The reason you don't is two fold, larger blocks increase axle wrap and you need longer ubolts to hold the assembly. Longer ubolts tend to stretch more which means the coupling between the blocks is now looser and you're also applying more force there. It's a compounding issue.

Now, what's the likelyhood? I couldn't tell you, but it seems like you actually off-road your truck and do you really want to be 60 miles out in the bush when you collapse a block? If you're street-queening your truck, then sure, probably won't be an issue other than the increased axle wrap.

Here's a quick blurb from 4 Wheel Parts:

https://www.4wheelparts.com/buyers-guide-reviews/lift-kit-how-to-leaf-springs.aspx

So, where does that leave you?

I think the Daystar cradles are your best bet, but I'm not sure with your jounce bumpers. They seem to be there most popular with guys that are doing exactly what you're doing. You can also look at long travel bags, but those are more money and you're replacing parts you've already bought, which sucks.

You could do a rear shackle with a larger bump maybe? Or an add a leaf? I'm not sure without understanding your exact setup and the measurements of the components, etc.

 

5" block in back of this. 2.5" up front. Stock shocks work fine.

 

Also, are you sure your jounce bumpers aren't too far apart as is? You shouldn't need to add as much air as you do to level it out.

Ultimately, a 1 in block probably isn't going to ruin your day, but I like to not have to worry about that crap.

 

I too am bugged when I hook on my 12k lb tongue pull. With only 1" extra in the back it wasn't enough. So I added 2". They have bump stop pads too.

Jack-it.com out of Utah. 150 bucks incl u bolts.

I ran stock shocks for a month. They worked fine but I added Bilteins. Now it rides like a German car.

 

 

 

So you want an unlevel kit for your level kit? Sorry had to. I want the exact same thing. Level kit looks great but add any weight and you have the horrid cali lean (rear end sag).

For this reason I plan to use the carli (deavers) full rear leaf pack with provides a 1" rake in the rear over the front 2.5" lift.

 

Bushwacker Street Flares

 

This is a really bad idea, you'll have one of the best riding super duties out there, but you'll lose about 1000 lbs of payload. You'll sag, way more than stock even, as soon as you hook up a trailer.

Check out Atlas Spring here in CA, they do a boat load of race trucks, but they also make commercial springs and aftermarket truck springs. Take a look at their Expedition models. They are supposedly a better street ride as well as specifically designed for towing and payload. I think that's eventually the way I'll go myself, just can't give up that payload, but I know you can do better than the oem ride.