F22 block questions

[1MYSTIKLXI]

I plan on swapping my old F22A4 block and manual tranny for a Better condition F22A1 Block and manual tranny.
1..Can I still use the same ECUfrom the EX?
2..When I change blocks do I keep the EX exaust components? ex. Dual sensors exaust manifold?
3..Should I keep the stock intake equipment since it adjust airflow to need or change it to aftermarket.
4..Will there be about same power boost? Should be better then the A4 it's not doing so hot.