License plate people in the big city (Houston) read from the state regulations that "TRUCK" plates were OK, but "FARM TRUCK" plates were not. I went to a much more rural county and the clerk there just OK'd my self restored plates and sent me on my way. That was 9+ years ago. Once you are in the system you are good as gold.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.