The 47.5 jet is too small really. And the 48 won't make a difference. With modern e10 gas you'll want somewhere around 50-55.
For a 2.2"E" I would go with 50s.
For reference my 3.0 likes 57-60 depending on the state of the engine. My 62 are just a little too much.
Some gasket kits use the weber paper gasket between the top cover and the intake "bowl". I haven't used alfa1750 kit yet.
Yes, you need the really big blade screw driver. Massive craftsman screwdriver in my tool box! I does take some torque to break them free.
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