[UncleBob]

the subaru carbs had major problems. Even when the entire system was stock, they can be very hard to get to pass emissions, they like running rich at cruise. I've never bothered disecting why exactly, because I don't "do" carbs....I just diagnose problems.

Your goal of removing the feedback portion of the system isn't worth while. What you need is a better carberator (or fuel metering system in general). Your problem is, I doubt you have a whole lot of bolt-on options that are cheap. You could, of course, swap out the entire engine with a more modern EFI setup. Not cheap. You could convert to megasquirt. Not only would it require a decent chunk of money, but requires quite a bit of learning, knowledge and fabrication.

If it was me, and I was being a cheap bastard, I would bastardize it to accept a better carb. Maybe a CV carb off of a Vtwin motorcycle. Plenty of carberation for your car, already downdraft config, and would take hardly any fabrication to make it work. Simply need a round tube to mate it to. Tuning it would require a little trial and error....but that would be a given no matter what you went with.

and...you could completely remove all the emissions crap these cars are infested with (I absolutely hate feed back carb systems too)

But then, I'm also very familiar with tuning carbs, and bike carbs....so thats the first angle I look at. Its probably not a very practical suggestion for most people....but I'd bet it could be made to work well if someone had the time to kill.