The SC kits I have seen are just belt driven half turbos. Just use the whole turbo.
A mod big bore is not going to turbo or SC well. The pressure kits like less porting, comp, timing, small carbs.
The more cc is about all it will like. But with the added pressure + big bore, the bottom of the cyl gets thin on BB and may break. Not sure I have not put a big bore under pressure.