Ah, I now see there is a 36mm intake restrictor requirement if one were to install some massive turbo.
Wait! What the heck does this mean?? My stock, tiny, GZE throttle body is 50mm and the 3S-GTE TB I plan to upgrade to is 55mm. This can't be right. What engine larger than 1.5-liters uses a 36mm stock throttle body?!
Edit: Ahhhhh okay, rule 17-1.15 is for
Aftermarket turbo/supercharger upgrades, or non OEM turbo or supercharged systems. Regardless if I choose SC12 or SC14, this won't apply to me as both are either beforemarket and/or OEM.
But any other OEM type Turbo or SC application may install a larger compressor so long as its OEM. Okay, so the idea of a 400 HP 3S-GTE is out the window in this class thank goodness

Edit 2: ACK! Look:
17-4.3 The shock tower may be modified only to allow the installation of camber/caster plates and only such as required to obtain the necessary camber and caster.
I violate the same rule that applies also to the Street class!

Edit 3: Why this?
17-5.5 OEM steering wheel must remain installed unless a race seat and race harness are installed meeting safety rules as listed......blah blah blah
So I can't even use my Grant steering wheel?!?!
Edit 4:
For both Enthusiast and Street classes, an interior roll cage is only "highly recommended". So we don't need one

Moreover, the next class up, Modified Class, does not require one. They only specifically require a cage for the highest class, the Unlimited Class.
Edit 5: Ok I've read most of the rules now. Forced injection cars entered for the Enthusiasts class may not change their camshafts. To this day I've still yet to check what cams my engine has. I'll be sure to check this.
In closing, the proposed changes I have in mind for my engine will not be finished in time for the Feb 16/17 race. The next race that isn't a long drive away won't be until July 20/21. So I think I'll just clean things up (I need to replace my windshield which has developed a nice long crack) and
enter the Enthusiast Class for Feb 16/17 (pending ruling on my camber mods and 6 speed). Then I'll upgrade to my SC14 and
enter the Street class in July 
Looks like I'll be holding off on the TRD header since that will violate rule 16-1.2.
I am going to post on their Facebook page to see about my 6 speed and camber mods.
https://www.facebook.com/RedlineTimeAttack