Most states require a CDL for routine use for GVW greater than 26,000.
Ed
Not necessarily so. It would be best for the OP to check with his state DMV/MVA to see if Historic/Antique registration would alleviate the need for a CDL. Also, he would need to check on what restrictions go along with that. And before we all get carried away with anecdotes from our own states, let's not confuse the OP. Let me say it again -- Once he has an idea in mind of what his rig is going to be (and weigh), he needs to ask his own state MVA/DMV/DOT... and get it in writing, if possible, to carry in the truck.
Before Christmas, I had been working on a Tech Tip on this subject ("Do I need a CDL to drive my Big Bolt?") Maybe I should get back to it ...
John