I took the opportunity to clean my throttle body and the butterfly valve within with some carb cleaner, a soft brush and some elbow grease. You will also need to remove any remnants of the old Throttle Housing Gasket from both the Throttle Body and the Intake Plenum in the car. Here are some shots of the Before & After:



Note that I prematurely connected the TVS to the throttle before realizing the need to route the sensor end of the wire through the desired path from the S29/2x1 (a.k.a X56) junction.

I replaced the rubber vacuum line elbows in "the hole" before reinstalling the throttle atop its new gasket. AFTER getting the Allen-headed bolts tightened, I reattached the vacuum lines where they belonged (two of mine got capped...another story). Here's the happy throttle with its new TVS:



So now the cleanest spot on my car is where you can't see it!

The remaining reinstallation is just reversing the steps outlined above. I also cleaned my MCU & Air Guide with some carb cleaner, inspected the underside of the Air Guide for cracks (it didn't have any: see timm9's cracked example at http://www.peachparts.com/shopforum/showpost.php?p=1920679&postcount=15), and lubed those hard-to-reach throttle linkage joints with some ATF. Once all back together, the engine took a little longer to start as it reprimes the fuel lines. My resulting idle speed improved about 300 rpm toward sanity. My idle is still not the ideal 600-750, but I've got more tasks ahead to remedy that.

Another "while-you're-in-there" task worth performing before reinstalling the MCU is to replace/clean/repair your Fuel Injectors, their Insulators and Seals. I planned to do that, but one part arrived damaged...so maybe next time...which will be soon, since I broke the big hose clamp securing the Air Guide (it fits so snugly, I didn't worry about near-term leakage) . When I get a replacement clamp, eight good injector insulators & seals, plus a new (revised) Idle Air Distributor line I will pop my MCU off again. I may even take it further and remove the intake manifold to replace my eight rock-hard Manifold Seal Rings and clean that gunk out of the Plenum.