A 355 is a 350 bored 0.030 thousand over.
You will need new pistons rings and all the bearings.
You will also need a complete gasket set, New oil pump and pick-up screen.
If you use the same camshaft and lifters they will have to be marked were they came from and put back in the same hole they came out of.
New timing chain and gears too. You should have a valve job done on the heads.
There is nothing special about a 355 CID engine. But it could be if you spent about 3'000 dollars on engine parts. You will also have to take it to a machine shop to get the block bored and the heads done.
It should have a 2.2L L4 engine.
what kind of scooter is it?
It will be a 305 or a 350 fuel enjection engine ( TBI )
No real problems it is a solid engine.
Chevy 409 is a big block V8 engine. It was produced by Chevrolet from 1961 to 1965. It was a 6.7L engine, with a single or dual four barrel carburetor.
5W30 oil.
I think your question is written wrong, but I think you need some kind of breather or the engine can build up to much pressure inside.
An engine
If it's a V6 it is a 4.3 litre vortec engine. If it is a four cylinder engine it is a 2.2 litre engine.
Highly modified Chevy 350.
5.7 liter vortec.
10w30