Welcome! I've always think if exists any preparation to increase the power "only" from 170 to 200 it will turn a better car, and to listen the 5 cylinders reving...
Wow bberg! I've just looked through your photos. That's some serious maintenance issues! Sad to see the cam lobes in such bad shape. How many kms has the car travelled? Do you know the service history? Could oil changes have been overlooked in the past?