there is available a big bore kit from a brazilian store. They even manufacture the cam needed to handle the compression and performance. Problem is they only sell it in brazil. If anyone has relatives or contacts there, it could be easier. I'll share their IG and online store links
Store:
https://produto.mercadolivre.com.br/...6-934ff1d452ab
IG:
https://www.instagram.com/retificamu...Q5ZDc2ODk2ZA==