Welp, after sorting through the parts pile and assembling the 3310-13...
...I found a minty-fresh 3310-2 mainbody, randomly slapped together with a bunch of non-3310 parts, for $15...
Still has really nice color, all the surfaces are straight, and it's not pitted to hell and back from being buried in a field for 20 years, like my other 3310-2.
Now I get to play Mr Potato Head all over again and figure out which parts to use on which carb.