I've never had the need to rebuilt or study a 2G or a 2GC so I have to "bow out" when discussion proceeds on how to rebuild one.
The attached picture is one I found on the Internet and posted it here on Stovebolt. At the time I thought it was crazy i.e. a 1 barrel Carter YF on a V8 small block engine. If you look at the diagnostic box and the oil pressure gauge, the engine is obviously running. Then a kind soul informed me that it was a homemade carburetor tester. Oh expletive! The point is, after rebuilding your carburetor, I would find a way to test that it works good enough for your engine break-in.
One more thing. I have nothing to justify my words but I, a novice, read "Aussie Speed" to mean "flat out". An intake designed to get the maximum speed performance out of your machine. I would do some research and have a fall back plan in case I was not happy with everyday street performance.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
