Well, for anyone who is interested in doing this mod in the future I found a great detailed article on how to do it posted up by the tech guys at RRE. Click on the link below:

http://www.roadraceengineering.com/1g2gheadswaptechtip.htm

Basically, to do this my assumptions were correct .... you need to some "extra stuff". You need a 1G head, a 1G intake manifold and throttle body, all the 1G water tubing, and you'll have to modify the head to accept the cam sensor and some other things ...

I'm at a crossraods as to whether I'm going continue w/ this since I discovered it's more involved than I thought. Although, I already I have the 1G head and I paid to have it machined. Oh, and already own a 1G intake mani. If I can find the rest of the parts in a junkyard I'll probably proceed. I'll keep you posted.

In hindsight, I should have invesigated it more before getting halfway into it. Oh well, that's part of the fun I guess.

1999 Eclipse GST 4G63