This 1948 Ford F1 — the truck that launched Ford’s F-Series line — keeps its original leaf-spring suspension and solid front axle, but everything else has been quietly modernized: a 5.0-liter fuel-injected V8, a C6 automatic, air shocks, and a leather interior with a flip-down console. Vanguard Motor Sales calls it freeway-friendly. Given what’s under the hood, that’s not an exaggeration.