I was slightly wrong, I licensed it as "Classic" --passenger car, motorcylce, or light commercial with gvc of one ton or less 25 or more years old. I could have gone antique--but more driving restrictions. They actually issue a set of modern plates and I pay an additional yearly fee to run my 1967 tx truck tags that they inspected.
http://www.dot.state.tx.us/vtr/spplates/allplates.htm
I also run classic insurance on my 67 C10 and 85 C4 combined full coverage no deductible for about $320 per year--some restrictions.