Putting Back Together KH Brake Hubs and Rotors

Ok,trying to get the new studs in is a little harder than expected. My main problem is trying to clamp the rotor. I don't have an impact gun and air compressor so I've been trying to man handle this guy in with my tire iron and either me sitting on my rotor or clamping the rotor in my cheap, tiny vice. So far I got 1 stud to get complete contact with the splines, I just need to seat it. Unfortunately, I've already stripped the threads on 2 of my lug nuts.