sorry for the delay - it'* been a busy week at work.
anyhew, i'm pretty sure (though i should really check) that the series I and II are incompatible from the get go, so I wouldn't be on it.
2) after a little bit of simple minded thinking, i realized that the gasket kit i got could not have been specifically for the series III... the TB on the series III is completely different (As noted before) than the series II.
this leaves 2 points for now:
1) the TB gasket has been changed. given the low stock of the upper intake manifold, i still find it likely that there is a change coming, since the gasket is so different from the stock.
2) that nice thick TB gasket they provide would be GREAT for making an adaptor plate between the series III upper and the series II TB - i imagine with a nice detailed drawing, a machine shop could fab up something for cheaper than the adaptor that the folks on club GP are using (for mating a series IV super with a LS1 TB, I believe),
i have access to the technical drawings for what is needed, but i'm afraid that would be overstepping my bounds as a gm employee... so i'll see if there'* anything i can do to aid in it, and possibly verify if someone else'* drawings are correct.
for the record, if you look at the series III upper (which i have been quite a bit lately
), you'll notice a little something that'* not present on our uppers around the throttle body. from what i can tell, that'* part of the gas system on the series III - it uses a return-less electronic fuel injection. and it also looks (from what i can tell) that it is merely mounted on the upper, and will not affect it at all if it'* not there.
so this is all pretty good news.
about the only problem i personally have is that the neck of the upper is a little longer, and in my engine compartment, the air intake doesn't leave too much room to begin with... so if i was to do this mod, i would deff. have to go with a custom air intake. it'* not too much longer, but the neck is prolly about an inch - inch and a half longer than the original upper - so be prepared. i'm not familiar enough with the bonnie to know if it'll need a custom air intake, but it'* prolly not a bad idea, if you were going to go to the trouble of doing this anyway.
oh, and again, the aluminum upper is some 97 dollars and change from gmpartsdirect
just something to smile about.
one last factual thingy mabober for today:
from what i'm seeing, the inner runners on the intake are still plastic, despite the aluminum main piece - in all of this, it appears that GM went for the most compatibility possible so it would have as little impact as necessary... which works out very well for us indeed.
and boy would that thing look nice if you could polish it up
i've only seen one in person, and i don't remember if it'* a little too 'gritty' on the outside for polish or not, but mannnn would that be pretty...
i'll keep you guys posted if i find out more -