Right, Shayne!
I've used both HS6 and HIF6 on mine, a 1969 164 with a slightly later
"E" engine with one of Shayne's super street perf cams, and a little
porting.
It is somewhat of a neck snapper.

There is not any big trick that could not be overcome by some mechanical
intuition and common sense. I don't know of a Weber setup that would
work, although I have a 3-carb marine manifold that I have dreams of
trying someday. It uses downdraft Solexes.

I think you can probably modify an original aircleaner box. Gotta drill
some holes in it is all.
The secondary butterflies in the manifold are the other issue. If the
carbs don't have the arms to open the secondary butterflies (and some of
the carbs out there DO have them) you will have to arrange to have them
open one way or another. One thing you can do is just remove the butterfly
discs. If you do this you will then have to fasten the shafts into the
manifold because the discs are what does this. What I did was to remove
the shafts and permatex some cutoff 5/16" hex head bolts into the holes.

The linkage is very straightforward. With HS6 carbs you need the shafts
that go between them, and with appropriate adjustment one of the 2 links
will work and you remove the other one. With HIF6 carbs you just attach
one link to each carb.

Hope this is helpful.
--
George Downs Bartlesville, Oklahoma