As I spend hours on the net looking at options of different carb/throttle body setups .I stubbled across this article.

http://www.fordescortclubsa.com/phpBB3/viewtopic.php?f=26&t=276
Bit of light reading ..

There are a number of parts you can utilise from the Australian stuff too.

I have used Falcon 4.0 rods and falcon x-flow pistons modified to fit the V6. Basically you can offset gring the crank to stroke it or de-stroke it. There are a number of Falcon X-flow pistons of varios dish sizes to acheive almost any comp ratio you please, and you can use EA-EL rods, or the longer AU rods.

The pistons need to have valve reliefs machined in, and there are a number of other small mods to make it work, but you end up with basically any capacity engine you please and alot lighter, stronger engine internals.

Cheers
Woz