I dropped my 240z body shell off for media blasting last Friday, at the time it was a rolling shell. Now it is just a shell on a rotisserie for complete blasting. To bring it home I was thinking of building a simple auto body cart using a pallet and 2x6 under it that the wheels will be attached to. The pallet I have is not wide enough to mount wheels to and then roll up the tire rails of my trailer. The pallet is 42"x42"x5.5". I think this will work, any thoughts?  Thank you.

I built one of these for my FJ40 restoration. I used 2" PVC, wood and a set of pneumatic casters. Worked very well. We moved it to the rotisserie and then back on the cart once the bottom was completed. I donated it to my local body shop when my project was completed.  I could go take some pictures if you need more information. 

Jerry, thank you for the offer. I think my idea will work fine. And it is cheap. A 42"x42" platform should give enough surface area for a Z shell.