What is the bolt pattern for a 1974 El Camino?

The bolt pattern for a 1974 Chevrolet El Camino depends on the wheel size and whether it's a standard or heavy-duty model. There wasn't a single bolt pattern across the board. You'll need to check the vehicle's specifications or the wheels themselves to determine the correct bolt pattern. It's most likely either 5x4.75" (5 lug, 4.75 inch bolt circle diameter) or 5x5" (5 lug, 5 inch bolt circle diameter).