Would a euro have 2.88? My '84 euro has 3.46. You can look it up from the VIN.

Anyhow, it has been attempted:
http://www.peachparts.com/shopforum/showthread.php?t=180013
Not sure what the final result was though.

And here are some engine links:
http://www.peachparts.com/shopforum/showthread.php?t=206227
http://www.peachparts.com/shopforum/showthread.php?t=194431

Grey market is when you buy a car overseas and import it to the states. Not sure exactly what euro delivery is but it is similar. There are a number of differences between the euro and US versions besides the turbo, there's the bumpers, headlights, climate control... some people like the euro look.