air flow tips?

[Festively Jolly]

i've been seeing some talk on this subject and was wondering if i can do
much to modify the air flow.  i see the filter cover on my '88 audi 90
FWD type 89 looks restrictive. can i cut a hole somewhere?   or would it
be best to re-route the filter elsewhere?
also,  after normal drive i open the hood and the hot air just hits me
like a wall.  are there some other bay cooling procedures that work
well?  i was thinking about venting the hood in some spots.  has anyone
done this to their stock hood?  where would these points work best?   i
am very interested in all mods possible so don't be skimpy on the
replies. teehee .  no, but thanks SO much list for reading my post!!