It would be neat, are you considering that combination as it should fit in the proposed TTS rules. I would be curious as to what a 66 and stock air box is capable of running myself.
On my old setup, 109 stroker, cast unported GN1 alum heads, 210/210 110 cam I made one hit and it went 11.2 at just 16 psi boost through the stock airbox. It is a restriction, but I think I could just crank the boost up and see where it ends.
Now I have a low 9 sec spec TSM engine, but still rocking the same 2004 66mm big shaft TE45a.63 and CAS V4. All summer I ran a bone stock intake and purolator paper air filter. I bet I could go 130 on the stock airbox. I dropped my max street boost down to 12, and it still feels like a high 10 sec car still and is barely even spraying alky at that level.
With my car to be legal in TTS, I'd have to trade my Weldon1100 and stock location billet tank pickup for an AN racetronix intank double pumper, ditch the 90* -6 AN adapter and mount my aeromotive -6 regulator right on my AN adapted stock fuel rail, toss the stock bumpers on, and stock seats and belts back in and M&H 275 50 17 inch drag radials. Then I'd cross my fingers no one notices the shaved side mirrors as not technically bone stock appearing. But I did build my setup to look as close to TSA but, larger, there's even a AiResearch tag on my V4...
In theory if I could go 9's, and if 66mm was legal, I "could" qualify in every single T class and go rounds in more than one class. But I've run multiple classes before, and it's a lot of stress both mentally and on the car by hot lapping. Last time I did it in BG 2015, tossed a paper head gasket and bent a piston not even pushing it that hard at mid 10's when the maf line blew and I lost alky.
Next time I get to go racing next summer, I'll see what a stock airbox can do.