Bob, that's a very nice muffler. Considerable time probably went into turning it's rear sections. I don't know how the front piece is attached, bit if you could turn a new cap to replace it then you'd have a good, authentic looking muffler. Some of the old mufflers, like the Kavan, I think, actually came with both a flow-through and a sealed front cap that could be interchanged. At any rate, you don't see those mufflers too often, so don't alter it too much (no JB Weld, please).

David