Multicylinder Misfire

[Bardy-II]

As mentioned, somehow previous owner has managed to literally chip a chunk out of the manifold, so in the process of replacing.
Still not sure it'll solve the misfire as it's on the opposite bank but we will see.

 

[Bardy-II]

Hey guys, was wondering if I could nag you again, so I've switched out the manifold, all tight no vac leaks, I even switched the injectors from one side to the other just to rule that out, but I'm at a loss
Still misfiring on 2,4 and 6?

I'm literally drained the last options would be the cat converters and O2 sensors surely?