Hey Paul, cool car and cool exhaust! I've seen you over at aussieveedubbers.com/forum before
I hate to cut in your thread....just thought I'd add my bit as I had a custom exhaust made for my type IV in my 63 too....here is a link to its full details (I'd post a pic but haven't quite figured out how to do it yet re. hosting the image etc).
http://www.netspot4u.com/~manxclub/gallery/album02
Once again, great looking beetle mate.
Alan