Body mods? Good or bad?

I recently got my hands on an Bradley gt2, I have wanted one since I first got into vehicles, well 150+ vehicles later I finally ended up with one which has me excited.

I took a good look into the car and realize it has front disc breaks, oilcooler and fan in engine bay behind the tire on driverside and has battery mounted behind passenger side rear tire. It also has full a/c system with vents on the dash. The interior is fully done up with a stereo and toggle switches all gauges and a short shifter. I also noticed it has brackets already mounted to prevent from "butt sag". I see these things are not common in most Bradleys! This unique Bradley also came with metal badges and licence plate frames. As well as build book, pics of dealerships lined with Bradley gts build pics of this bradley and other documents..

With all this said, would modding the body be a bad thing? I mean it is still a kit car, and the back end is soooo square... I love from the back of the door to the front of the car. But I plan to do some fiberglass mods from the doors back to make it look more like a beefy Ford gt40.

Opinions are always appreciated.