Thanks for that, I'd found the Alfa BB post but they don't appear to have come to a firm conclusion! The second link appears to confirm that it should fit a 12v V6. I'm half tempted to rip the old pan off the spare motor at the weekend and see if it fits and then reassemble. At least that would give a definitive answer. Trouble is I've used up all the brownie points with handbag control going to the Manchester Classic Car show last weekend.....
Guy