For those who have been asking. Get a SBC primer like Proform and remove the Aluminum sleeve. Replace it with a stack of washers of the correct height to match the sleeve removed. The outer washers need to be 1.365 or slightly smaller is ok. You can grind down larger washers with a belt sander while you rotate them between your fingers. Questions? just ask. Pretty simple. If you have a lathe, even easier. You can also use plastic rod with a hole drilled in it.
