What crankshaft for Pinasco 213CC

Hi

I have a PX 200 engine 91 on an ACMA, I just got a Pinasco 213 CC , stoke 57 mm, and a Keihin 30 PWK I would like to order:

- Race crankshat wondering which Race crankshaft will be appropriate?Can I use a 60 mm stocke if I had 2 cylinder gaskets of 1.5 mm (base and top)?

- Does it make sense to add a MMW intake manifold with readvalvle? if yes which one?

- I want a first and 2 short gears, which ones and and what else do I need to change?

Thks anyone / everyone to help me there?

Vespaly yours!!