Clio A 1.4l. Performance increase/engine tuning

Hello together! I wanted to ask if someone here has “forgotten” the Clio A 1.4l engine in terms of increased performance? I am not talking here about such an open air filter or the like, but about “real” engine tuning. Is it possible to build a different head, which parts of other engines might fit with what you could achieve, other cracks and exhaust system, maybe the parts of the 1.8 or 1.8er 16V? ect. We nn someone has experience with it, or, also has tips where I might get informations, would be very helpful to me. By the way, I am a car mechanic at a Renault contract workshop, so the supply of original parts is no problem for me. I am grateful for any help! Greetings, Chris