My 5 cents Worth !!!
PotentZ,
We are all talking hypothetical theory here, so lets see where it leads.
Mr. P, from Geraldton, has me right, as the weekend before, we lent into the back of a very nice R10, with twin 45s, and it was running terrible (French accent). Because sides have to be run very regular, and set (mainly float levels) very regular, to run nice. So for good street I recommend a Weber down draft.
Now comes, how much work do you want to do for your project? A good basic 1300 or 1400 (Virage), with a mild cam, some home done gentle head work. A good exhaust manifold. Is going to work very well. 1300 I would use a 32 Weber, a 1400 I would use a 36 Weber. Not sure of inlet manifolds sold in Australia with the 1300, but in Africa we had a Weber unit on the last 3 years. But then you could always use a R9/11 with an adapter plate to turn it sideways, as they flow more air, and match ports. This would be a very good car, and a lot of fun.
If you want to hunt Falcons and Commadores, you will need a 16TS type motor and big box, and big cheque book. Anything more than above you have got to go big box, as a well modified 1400, unblown, will destroy a 330 box eventually. The Weakest Link.
Enjoy yourself !!!!