Shows how much I know... I was thinking that a Montreal 2.6 V8 should fit into an Alfetta GT/GTV6 engine bay, well low and behold AutoDelta did between 12 and 20 of these in 1977 for a German distributor.
There are two GTV8 cars in Germany. One of them the testcar for the german project(red) and the other a self built car(champagne) built with some Autodelta parts late in the nineties. Both guys have their own homepage with a lot of informative photos.