I have a 2007 Boulevard M50 that started having an engine knock and I am looking to switch out the engine. Can I switch out the engine with any Boulevard? Either M50 or C50 within the right year range? I don't care about the difference in colors, really that I can just switch it out, mount it, and everything will work like normal. Sorry if this has been discussed already, I have looked but have not found anything. Thanks in advance.