Wentworth has an O360 exhaust on ebay, may be a deal if it's what you need.
http://www.ebay.com/itm/1974-STARDU...ash=item211c7f402d:g:2hYAAOSwa~BYScWn&vxp=mtr
http://www.ebay.com/itm/1974-STARDU...ash=item211c7f402d:g:2hYAAOSwa~BYScWn&vxp=mtr
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