2.02 or 2.055 valve?

2.05's will in turn end up having more bowl volume, which could be good for stroked/cid increase over a stock cid.
Yes there can shrouding but when going to larger 2.05 you could say/assume you'll also have more flow 'depending', for if you're going 2.05 you would most likely have high flowing heads-280 or better with factory iron/rhs or 300+ with w2/5 or indys etc...
So in other wards...the cfm loss from shouding/or effect of the eddies seen form the air crashing and backing up could be offset say if there were only certain expectations that the heads over shoot to begin with in power when having that much cid to feed.

hope you guys get what I'm saying.

really if the heads are good for what you are doing the 2.02 should be enough.
but there are always variables, like someone removing too much from the bowl area or farside bowl area....now that 2.05 looks good cause after cutting for it, you gain back lost bowl material to work with .