yep they are,but only to check the height I need. I just yanked them off the jeep I was scrapping and decided to check the ride height and discovered the springs were Wayyyyyy to high for me. after I get the engine and tranny in (temporarily) I'll decide what type of spring work needs to be done to get the car sitting with the wheels stuffed into the wheel well . either new springs, de-arching the new springs that are on it now or getting the original set rebuilt to the height I want. Then the blocks are GONE! BUT I've had the car up on the dolly cart so long that I just couldn't wait to get it back on wheels too!