Motor conversion

Moin is just looking for a “project car”, and I came across the Calibra a few days ago. What my problem is, in Austria there are no 2.0 16v turbos but one of the already felt rusty. Before that I have to say I would like to get the already somehow on 230-260ps without which the engine after felt 1year has a damage. Is this possible? Have seen me several nice 2.0 8v with approx. 130tkm – 160tkm even a fl 2.0 16v with 65tkm. Etc etc What should I do best? Which engine would be best suited to reach the ps number. If in the eyes of the 2.5i v6 (in terms of space the eig should also go) 2.0 16v Turbo 2.0 16v have no experience with a motor conversion, would let such a thing be done by a professional. I am very grateful for every answer I get, always like to learn about it.