I'm enjoying the difference of opinions here and I encourage them to keep coming.

My opinion:

Now I don't know as much as you guys all do as I'm still learning however in relation the Z18ET head that a lot of people are dismissing...

1. It has been used in race applications with some very successful results. And still is being used by some (Troy Morrow) with impressive results. I'm sure they are not standard heads and have had plenty of work done to them.
2. Stu is using it on his 120y and from what I hear and see...it's a pretty cool little weapon...if i could get my car going with those numbers i thibk id be happy. He's running it on gas also...so I can only guess that on petrol it might even go better (not to bag your setup at all Stu)
3. Ease of using the standard efi setup than converting an L series???
4. Many of people have used this head with good numbers and have had good results.

So to say that it is a "dud" is probably a bit far. There is still plenty of good about the head.