My Astra 2.2!

Since I was part of the forum, my little one had never introduced you!
Astra 2.2 16v Z22SE.
The engine will be rebuilt in summer, making the following modifications

Elimination of balancing shafts
Carrying and polishing the cylinder head ducts
AACC removed
CR increase to 10.5 or 11: 1
2.4 inlet manifolds
Exhaust manifolds?
Exhaust line in 55 mm

With that I want to reach 170 hp less ... will it be possible?
Thank you very much!