I'll throw this out there:
Been a time or two I've run into a situation where the bowl gasket is in good shape, just compressed, and not sealing because it was disturbed.
so I stretch the bowl height a tad---
How? by setting it on large socket, near the size of the bowl, and putting a smaller socket inside, and a light tap with a hammer, effectively lengthening the bowl a few thousands.
it don't take much, nine times out of ten, it reseals just fine.

Now as far as clone carburetors:
I've experienced that walley-booger and carter use SAE threads and
SOME clones, use metric.
So they do not interchange/play nice together.