This job is pretty straight forward to do without a spring compressor. You can do this by jacking up the car, taking off the wheel, blocking the lower wishbone, and lowering the car to compress the spring. You will then be able to remove the eccentric bolt assembly since the top wishbone is not directly connected to the spring. Be aware you may be in for some surprises though. The first time I did this job was on a 1971 280S which has the same kingpin set up. I got as far as removing the top pin, but try as a I may, I could not remove the threaded insert. No amount of force or heating would get it to budge. In the end, I had to remove the entire front hub/kingpin assembly and have the kingpins replaced. Years of ignoring lubricating the top kingpin assembly had “welded” the parts together. Hopefully, you won’t run into this, but it is a common issues especially on those cars where regular lubrication was not followed. Good luck.