With a 20v swap to a CGT, it would be either ITE or STU . STU (iirc) is 2.5L and under. I always thought that a 4K with a AAN would be a possible front runner in STU. Or just get a turbo kit for the 7A....OR ...find an Urq an put an ANN in it...( ok I'm dreamin)

I casually browse the ST stuff and it seems that the turbo cars have the upper hand as of late . But tGA would have a better handle on that than me....

-John