This topic strikes me as an item for the HOTB Newletter... Hmmmm...
Nice pix, there Cliff!! Thanks Paul.....you are welcome to use any and all pics in your posts or HOTB I have posted 
Well, just to add a few particulars for a "heads in place" procedure: (and I'll get to writing that article later))
Of course you'll need a chip (from Marc or whomever). In addition to secondary delete feature, he can also include in the program (as a minor expense) a -
-decelleration fuel moderation that will suppress "popping" in the headers, should you have them.
-program adjustment to turn both fans on at (I wanna say) 205ºF and turn them both off again at ≈ 200ºF. Not only does it keep it running cooler on a hot day, but stabilizes the temperature within a relatively narrow window. I suppose there are some unseen advantages in that as well??
-provide fueling changes to accomodate top end porting (for example) to carry over until the tune can be tweaked on the dyno.
Secondaries removed...
In my case there hasn't been a single downside to their removal that I'm aware of. It has been ALL GOOD. In addition to freedom from vacuum leak/vacuum pump issues, throttle response is improved, secondary valve remains clean(er), and perhaps there is some improvement in performance resulting from removing the plates and rods from the critical center of the air column. And, in my case net mpg remained unchanged.
The one item I can't comment on is emmissions compliance. OBD-I cars are exempt from emmissions tests in IL. So, I've never tested it before or after to know what (if any) impact removing secondaries has had in that aspect. Perhaps someone that is required to meet emmissions can comment further in this regard.
Just as an asside...
In the end, the "FBI 500" package, including the removal of the STPs, is a
remarkable modification! Mine resulted in significant power increase without compromising mid range torque (actually increases it some!) overall reliablily, the integrity of the motor, mpg, idle quality, or (street manners) drivability (noiser exhaust excepted).
That is some trick for 5.7L V8 without VVT or the like. Long live the ZR-1 & LT5!!