best 273 mods?

at the moment, it cruises to the occasional run, although i'd like it to be a bit more of a daily driver then it is, car has been quite happily driving around on 7 (yes yes i know) due to the broken pushrod as long as i've owned it so slapping it back together as is will prolly keep me happy.

The thing is, it doesn't have my touch to it, after two years of ownership it still kind of feels like someone elses car, everything is as the previous owner had it. so i was hoping to make a few subtle changes to make it my own.