I'm replacing the front suspension components on my 1990 k1500. I bought a poly bushing kit last year. I ended up buying new upper control arms from mevotech but as it comes with rubber bushing I would like to use the poly bushings. I can't figure out how or even if you can remove the rubber from the metal sleeves, it appears to be crimped and one solid peice through the middle. Any way to get these sleeves off?