This 1975 Datsun 280Z called “Assassin” was previously powered by a 383 ci Chevy V8. However when that motor broke, the owner replaced it with a 454 ci big-block V8. Plenty of power and torque for a 2,700 lb sports car. Other upgrades include aluminum racing radiator, modified headers, and a R230 limited-slip differential. The owner reports a 0-60 mph in 3.5 seconds.