The firing order for a 1974 Dodge Challenger depends entirely on the engine it has. Dodge Challengers in 1974 came with a variety of engines (slant six, small-block V8s, and big-block V8s). Each engine has a different firing order.
You must specify the engine size and type (e.g., 225 Slant Six, 318 V8, 340 V8, 360 V8, 400 V8, 426 Hemi, 440 V8) to get the correct firing order.
