Cheap tubular control arms for replacements?

Look at the replacements you have and this pic, it will tell you what you can and can't cut. Before you cut, measure the OD of your bushing and the OD of that sleeve to the inside of the A arm. They may be different from my pic and longer than the later model arms. You can cut the end off of the bushing on the outer sides, then you can burn/dig out the rubber.