Our ABANDONED Volvo 850 GLT to BTCC HERO?

My girlfriend got this car 10 years ago and has been in the family since. At one time my parents had it as an extra car in case one of their cars needed fix or broke.
Then they did'nt needed it anymore and my father was actually gonna send it to scrap. But I couldn't see that happening, so I took it home.
And then, I got the dumb idea to make a cheap BTCC-Look car out of it.
It is a 2.5L 170 factory horsepower NA engine, and it is staying that way. My first ever build not involving a turbo!
This build is just for fun, it is not intended to be a show-breaker and perfection trofy. It will be made in my garage, with what I've got, just for fun.