I do a 20 mile highway drive once a week to buy hay from the farm. My 49 has a 235, stock 3 speed and 4.11 rear. 6.50-16 bias ply tires and my sweet spot is just below 55 mph. It seems to love it. If I take the back roads I cruise about 35.
1949 Chevy 1/2-Ton "Sedgewick" In the Gallery 1989 Caprice