If I were you, I would find some alluminum piping, rubber doesn't keep very much heat out, unless you wrap it of course. As for a 2.0 Intake manifold fitting, this is your results:
Your Intake Manifold: (_)
A 2.0 Intake Manifold: (___)
See the difference? The ports are way bigger since it is dual over head cam. Which comes to the assumption that there is no way in hell it will fit.
As for porting your intake manifold, that's a good idea. I did it too actually, basically ported the whole thing, very good idea on both manifolds. Expect quickly accleration, and alittle bit more horsepower. A 4g63 with this upgrade saw nicer acceleration, and alittle more top end power. His 4G63 is running at like 145, maybe even 150, with only a K&N filter, and his manifolds ported and polished.
It makes the difference. Like I said though in your previously posts, the problem is if you can't wire up your MAS, you'll be screwed, so you might have to do double piping, which then leads you to how to keep your filter on
