Anyone knoe anything about these carbs? They good bad??

Solex is an older company that IIRC built carbs for Volkswagen and isn't in business anymore. They were either single upgrades from stock or dual carb set-ups. I had a set on my dune buggy but that was almost 20 years ago. They worked pretty good and were easy to work on. The company was sold/merged a few times so I don't know if they're around. Couldn't tell you about parts availability or interchangeability. I can tell you the 31-30 is too small for a single carb set up. It was meant for dual carb set up.

Im just wantinf to run it till i can get a 32-36 weber would that fiesable

The old Opels used Solex also. When I had my 70 wagon its the first thing I did, toss the Solex and installed a Weber.

It 'might' be feasible, but without access to jets and thus the ability to re-jet it, I'm fairly certain you would run a bit lean and suffer some power loss starting around half throttle if not off the line. A lot of work to adapt it and find out it doesn't cut it.