A few things you have to keep in mind. The 75 could be a large bolt pattern car whereas your 71 is probably a small bolt pattern car. If you do not want to change from the rims/tires you are using now I would recommend only using the K frame. BUT - if the 75 is a disc brake car this would be a good time to swap over to the later disc brakes. And make sure to get all the disc brake related hardware from the 75 - prop valve, etc. Make sure you also swap in the 75 rear end too so the bolt pattern matches all the way around the car and the v8 radiator.