Can you put a lift kit on 1975 ford ranger?

There was no Ford Ranger in 1975. The Ford Ranger pickup truck was first introduced in 1983. You're likely thinking of a different Ford truck from that year, possibly a Ford F-Series (like an F-100, F-150, etc.).

If you have a 1975 Ford F-Series truck, then yes, you can put a lift kit on it. However, the specifics depend on the model (F-100, F-250, etc.) and the type of lift kit you choose (body lift, suspension lift, etc.). You'll need to find a lift kit specifically designed for your year and model of Ford truck.