Had a similar problem once in a 1293 Turbo mini that I built up. Stupped fun but I remember sitting at the trafic lights with a chap from work when the car started filling with smoke and smoke started coming out of the vents in the bonnet. His face said it all, I just though it was a bit of clutch and brake fluid on the manifold. At the next set of trafic lights things had got so bad we had the windows open, when some chap pulled up a long side and give me that look. I saw red, the light hit green and we both took off, me like the dukes of hazard him like a little boy he didn't know what hit him. I eventually pulled up and lifted the bonnet to find that the mechanical oil gauge pipe had melted and was spraying oil everywhere, a quick melt on the manifold and some burnt fingers stopped the leak but it was like the Exon Valdez around stoke for the next couple of days. Oil everywhere I had parked. One the cars you love but don't ever want to work on. 3 oil pumps, 2 cam shafts, 1 turbo god knows how many rebuilds and I had the ford bug again.