49bourbon,
I used the original LCF cab, a conventional cab and a panel truck. The roof and b pillar is off the panel truck. I flipped backwards the door jamb I cut off the original lcf cab and used it as the back of my b pillar. The inside of the b pillar is what was there from the panel so it is completely boxed in. I also boxed the bottom of the b pillar that is below the floor in between the steps. Under the cab, I continued the c channel bracing that lcf cabs have all the way to the rear mount. I also added a cab support that will mount to the frame in where the two pieces of c channel mate together in the middle of the cab. Not sure I need it because I just have the rear and front mounts bolted to the dolly I made and there is no flex at all in the cab. I even jumped up and down inside the cab and could not get it to flex. I tend to over engineer things. I would be mad if the cab started sagging at some point. let me know if you have any more questions. On a scale of hardness from 1 to 10 I would give this a 12.Shane
LOL on the difficulty level. What you do depends on what you want for a ride. Are you only concerned about the ride with the trailer on or for bobtail too ? I would remove the overload springs either way and let the air bags support the trailer. They are rated for 3500#. I would still use the electric compressor, reservoir tank and a leveling valve, rather than inflate manually. You will get a better ride. If you want a softer ride bobtail, then I would remove a couple of the main leafs too. All the add on kits I've looked at are the convoluted style and not my first choice. They ride harder than the rolling bag style. You may be able to fabricate mounting plates and use the rolling piston bags, reservoir and leveling valve from the Freightliner instead. The issue with them may be height. They may be too tall to fit between the spring and frame.
