There really isn't much that's frowned upon with these cars and especially not in this forum! As long as you like it...Not sure where you would find a hood that fits that already has vents, though. You would be better off designing something and modifying the stock hood.
The idea has been kicked around a bit on here and in the Facebook groups. A few people have come up with working vents and others have added scoops and so forth for looks. The best example (IMHO) so far is the F-40 style hood that Russ Carlson (CapriTypeR) used for his "Super-Roo". I'm sure he would be more than willing to post up a pic, I can't locate any at the moment.
Whatever you decide to do, post up some pics and build info so we can all see how awesome it turns out to be!