2 barrel to 4 barrel conversion

I'm sure that this has already been covered, but a quick search using the forums search function didn't bring up anything specific.

Now, we're talking about this probably months before I actually plan on doing it (unless I come into some money lol) but I would like to replace the 2 barrel carter carb I have on my 318 to a 4 barrel. I know I'm going to have to find myself a new intake, but what else do I have to consider? I have heard that the kickdown (or throttle pressure linkage) will not work. I have also heard that there is a conversion bracket for it. What else do I need for a four barrel conversion?