Hi there,
I'm not aware of any that have been done but it would probably be similar work to the other conversions, maybe without the extra hassle of efi wiring.
One here for sale.
http://www.boostcruising.com/forums/ind ... pic=670180
I've not laid eyes on one in a while but from memory they are pretty compact. There was another 3 cyl conversion on here which only needed minor subframe mods so from that point of view it could be worth it. Depends what you're after, I guess most people figure if their going to put in the effort might as well use the best motor they can.
Madmorrie