More than a 18" U-bolt with stacked blocks is a accident waiting to happen. They sell shorter blocks with the 350 kit since the 350 sits higher from the factory. You got a salesman that didn't know his stuff and sold you a kit that was not designed to do what you wanted it to do. Selling you a F250 kit that didn't raise your F350 the way you wanted it to is Fabtech's fault? I think not. You need some new rear springs for what you are wanting to do. Blocks are not the way to go in this application.
Trucks that are level or even a little higher in the front ride 10x better than one that is higher in the rear. I also hate the look of a nose high rig but they do ride nice. Level rides much better than tail high. Air bags or overloads are needed when a level truck is loaded heavy. My current suspension setup sits about .5" high in the rear when empty and about 1" nose high when slide in camper is loaded. If I adjust it so that it is level with the camper the ride becomes harsh. I also installed a leveling kit on our F150 and it smoothed it out a bunch. Think about how the truck will react when it hits a bump if the rear end is high. Imagine that the frame is on a 45 degree angle and think about how it would hit the bump then think of it nose high at 45 degrees and think how it would glide over a bump.
I guess that's why Fabteck put 34" Shocks (same as OEM) in a kit that raises the truck 8"s. I think Not! The salesman Knew exactly what he was doing. We discussed it for 2 hours before I purchased the kit. He didn’t know the U-Bolts would be too short.
You see, you have to be smart enough to build things properly. Fabtech is not. There are some other things that are crazy stupid about the lift also. Like the Drop Track Bar Frame Bracket. I have a Skyjacker 6” lift in the loft the Drop on FT DTBFB is 1” Shorter then that one. The hole for the Track Bar is closer to the passenger side of the truck. It’s also lighter steel then the skyjacker, and has a Brace you install back to the frame. That’s Not really what I would want. The Skyjacker unit is installed.
I guess what you are calling the “Leveled” look, looks good to you. If it does, I’m happy for you!! If it was for me I’d be he happiest man alive!! It doesn’t do it for me!!