Side drafts

I was a motorcycle mechanic for over 25 years. I was sorta the go-to guy for carb work. Most 4 cylinders had 4 carbs, and 6s had 6 and so on. Once the factories started putting them on a common mounting plate and a common throttle shaft, life was easy.
But then guys would park them for the winter,and neglect to either drain them or put stabilizer in the system, and the following spring, I got to do it all over again.
Motorcycles have a very narrow window of operation, and most multis are CVs, and generally stay at one altitude, give or take. And the throttle valves are barely bigger than the intake valves, and the intake runners are extremely short. But the thing is; the airbox is a tuned part of the system. If you mess with it, you will have issues. And if you got those bugged out, you invariably introduce a new set of issues. And every stinking change is multiplied by the number of cylinders.
So while I have great confidence that multi-carbs work on motorcycles, there is no way I'd stick a bunch of them on a car-engine that has to operate under so many more conditions, and especially on one that is way under-powered for it's chassis in the first place. I mean most motorcycle-multi's are operating at well under 12 pounds per horsepower, and getting down to 8,7 or even 6. And you hardly ever whack them open under 3000 or 4000 and they have WET-CLUTCHES.
The lightest chassis for a slanty is the early A, and you'd be lucky to get that combo under 20 pounds per horsepower. And it will have a TC in the range of 1600 to 1850. So good luck signaling multi's with that. Then you throw in a wild card like sucking hot underhood air, changing altitudes, and rainy days, and heaven forbid, snow,lol.
Well I might put three duals on the manifold, but probably one or maybe two are gonna be fakes.
I better add that I have great respect for the person who can make a set of them work properly, and I'd be willing to bet he has many,many, hours into the set-up.
Yeah and just to drive a point home, most slantys will be happy with a 250cfm 2bbl, right on up to 3800rpm, And from there on, it needs just a bit more, like 300 at 4500,and about 25 cfm per 500 after that.