I have a 1973 Ironhead 1000cc. I do not want to put the left side primary case on. I want the primary exposed and if possible to install one of those trendy thick primary belt drives u see on big twins most often, i cannot seem to find one sold for an Ironhead. The engine is a right side shift and right side chain if thats relevant. What modifications will I have to make so that the whole left side primary, as is, can remain exposed?