Factual error: When Steve blows his motor, as the crew is disassembling the engine, the pistons are not hemispherical-chamber type, and by 1968, no 426 wedge engines were in use.
Factual error: Despite numerous crashes throughout the racing, only one yellow flag was brought out. Cars were required to hold their positions under a yellow flag.
Factual error: First time I ever saw a 600 mile NASCAR race where nobody had to make a tire change.