Can I remove the 575 resonator with only the rear of the car on ramps?
Yes. You will want some decent height at the rear allowing you room to move around when you do work towards the front. Obviously it would be better if you could get the front up any amount. Bill FL
Pair of jack stands at harbor freight are not much money. I leave a floor jack on both sides for safety.
If you can get a lift, it will be invaluable. I found pulling the resonator required some "horsepower" to pull them from the two cat's. It only takes one sticky connection to a cat to be a real royal pain. And there ain't much to lever against when doing it. Good luck, brother!