primer&rust

I have removed the backing plates both ways and I would say the easiest way for me was unbolting the stub axle, of course I was using a 4" grinder with a cutoff disc, it might be easier with your sawsall. The side I unbolt I had a huge pipe on my breaker bar and it wasn't real easy either. I used the Maxima brackets and cut them with a cutoff saw removing one mounting hole so they could be slipped on or off in the future if needed.

KYB struts are good and cheap but are not suppose to work well with lowering springs. I have had these strusts on my car for over 8 years and they still work great. If I were you I would check the valve clearences and the timing chain adjustment because if they are off, they can cost you some power. I have a 1975 280z like you but it is primered and rusty as my name says. Some people say you can unstick injectors by spray carburetor cleaner into them and pushing on the injector needle valve with a flat screwdriver. Have fun these are great cars.