Speaking as someone who has owned a direct injection turbocharged engine, you don’t have to worry that much.
Every domestically built flagship Holden from 1948 to 2006 (48/215 to VZ) came about because Holden had taken an existing Opel and played with the platform and stretched and strengthened it. Except with VB-VL, Holden simply took Senator A and and re-engined it.
No. Sorry. They don’t. I love these cars and yours is spectacular. But the wheels? Not so much.
I can’t beat 1/400 from the factory, but considering the longevity of Mazdas in the wild and that there were only 1243 usdm 323 GTXs in the first place, I bet that this comes close!