I picked up a 1974 cl360 today for 2100. In pretty good condition. Top muffler has a few holes in it though... click the picture to make sure you're seeing all the holes. anyone have experience repairing these holes? If this is not possible, I'd be interested in buying a new muffler, but obviously these are hard to come by. Muffler is a HM370, it's the top one/for the right cylinder. Anyone selling one of these/know of anyone selling one? Honda part number is 18300-370-000