The curb weight of a 1970 Ford F-100 varied considerably depending on the specific model, engine, and options. There's no single answer. You'll need to specify the body style (e.g., Styleside, Flareside) and engine size to get a more accurate estimate. Even then, it will only be an approximation as weights varied slightly even within the same specifications.
To find a more precise weight, you'd need to consult a 1970 Ford F-100 owner's manual or a vehicle specifications guide from that year.
