Rob http://www.ebay.com.au/itm/Lynx-crossover-manifold-and-40DCOE-carburettor-to-suit-Volvo-B20-/251595804324?pt=AU_Car_Parts_Accessories&fits=Make%3AVolvo&hash=item3a94474ea4&_uhb=1 too expensive.
egads If it wasn't rusty price is right but that is a fair bit of external rust which makes me think internally the carb may be buggered or need a bunch of work.