Convince me to not use this carburetor.

OK, let me further explain why I am choosing the Aussiespeed 2 barrel intake.
Since the Aussie intake has a Holley bolt pattern which would not require an adapter, because I hate adapters, I could currently remain within a budget which would allow further upgrades when I can tap into my 401K in four years.

Since the Aussie intake has a Holley bolt pattern, and injector bosses, I could convert the car to either a Holley Sniper 2 barrel, or install multi port fuel injection, at a later time. I would only have to remove the intake 4 years from now to get it machined for fuel injectors. Does this sound reasonable?
makes sense now that you explained it. That info probably should be in the first post so folks know the details. In your first post all you mention is the price of 2bbls for a slant six, so I think you are looking for the cheapest 2bbl for a slant six. I bought one cheaper than what the link you posted, so I posted my link to give you another option.