We possibly have different views of track car
I’m doing a few. But the first Mira of mine is k3ve2 complete conversion
Will have proper LSD and short ratio custom gearset and FD
For sure totally replaced suspension
The class I’ll run allows engine swaps but you add capacity from OEM… So I’d be 1600cc class with mine. Then later going turbocharged it puts me in 2ltr plus class as we take capacity and multiply by 1.7
So the plan is to get it balanced before looking for big power
Interesting your thoughts on under tyre. Is this in an L2? Are you talking about standard spec sizes while running standard suspension?
I haven’t taken a Mira to war yet. I’ve been stuck with other cars on track. But my family have raced through a few models including storia and Mira L5 and never had massive issues with tyre sizes. Perhaps nz weather changes variables a bit?
Is also probably a very personal thing as to where you judge the cars ability and want to change, versus what youl accept and choose to drive around the difference. Looks like you’re of engineering mindset, so get the bug to fiddle things first? I have a brother like that 
But to answer your thoughts on wild ability to the class, we can change anything suspension as long as standard mounting points are used.
Bike engine over here would have you in modified saloons class which is not for the fainthearted indeed
But it’s also a big call what youdo to a car I believe. Go too extreme and you spend too much time fixing it or get in a class around madmen and machines. I like the production based classes. My history is in one make classes andkarting. I’m much more interested in something like 660gp Japan series than super power monsters …but I’m no engineer no claim to be.
Anyway, agree its good there’s still some dai racing interest out there