I am installing Road King mufflers on my 83 Venture Royale.I had no trouble getting exhaust pipes between the muffler and the manifold.My question is does anyone know a way to fab the rear brackets?I have an idea but am looking for other options.Also can the mufflers be drilled out or will it cause problems?With the new mufflers on it sounds pretty good but is still quiet.If they can be drilled out,what is the best way?Any help would be much appreciated.