I'm pretty sure the Cosworth's used the older
iron 4cyl block,
not the first-stab-at-the-Alcoa process, which Porsche used quite
successfully in the 928...
Maybe the street Vega's had it in iron, but the race engine
that was used for other things, but based on the Vega engine, was
definately aluminum. The article I mentioned talked about their
sleeving process. I didn't care for the car much, but I wanted the
engine....
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757