FWIW
The early carbs also had float bowls that didn't corrode anywhere near as easily as the ones we have now.
(if you used methanol)
They were a different design as well and didn't have the big brass plug in the bottom.
With the old ones you couldn't change the main jet without taking the bowl off.
The new style make experimenting with different main jets so much easier.
Just remember the main jets for a 206 must be
Stock, Unaltered .0365” Go (Use .0365” Class Z Go), .039” No-Go (Use .039 Class Z No-go)