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The weight of a Ford 302 engine, or the 5.0-liter V8 commonly associated with Ford's Mustang and other vehicles throughout the 1980s and 1990s, varies depending on whether it's equipped with iron or aluminum heads and the inclusion of ancillaries. On average, a bare 302 block weighs approximately 140 pounds (63.5 kg). When fully assembled with iron heads, intake manifold, and other necessary components, the weight can increase to about 450 to 460 pounds (204 to 209 kg). Opting for aluminum heads and intake can reduce the weight significantly, potentially bringing the total closer to 410 to 420 pounds (186 to 190 kg). This makes the 302 both compact and relatively lightweight, contributing to its popularity for performance applications and engine swaps. Its balance of weight to power output has made it a favored choice for racers and car enthusiasts looking to enhance their vehicles' performance while maintaining manageable weight distribution.