Who is using an oil deflector under the intake?
Being a 75% race 25% street guy, my car did much better with an electric fan. I use a 2007 Chevy HHR fan...for only 50 bucks it pulls a crap ton of air (over 3000 CFM if I recall correctly). The difference at the strip was close to a tenth or more if I recall (its been a few years since I did the testing). To me, that was totally worth it, plus I can cool the car easier in the late rounds when they begin to round robin.
That doodad in the lifter valley....with a Victor intake (with air flow under the plenum), I doubt you would be able to detect a difference at all.