Who, me,
I couldn't agree with 53moneypit more! I bought my '56 in 1972 with who knows how many miles on it. I drove it until 1975 without a care about rpm. The engine finally got to tired and I replaced it with a used rebuilt 235 from a 1957 pick up that ran well. I went right back to driving the h**l out of it. The drive line was a stock 235, stock 3 speed, and stock 3:90 rear end. 31" tall tires. From 1972 to 1984 I probably put close to 300,000 miles on the truck, a lot of it at highway speeds. If the power train is in good shape, don't be afraid to drive it and let it know who's boss!
best wishes,
Les
