Car looks great. Wrong tire size and wheel offset though. Running a stiffer spring may help, but probably not as much as you'd think. You'd have to get pretty stiff and you'd notice it everywhere.
As already mentioned, the First Gen birds typically run a bit of a positive offset. Remember Positive offset, pushes the wheel in towards the center of the car. Negative offset pushes it out away from the car.
Get out your measuring tape and some straight edged and see how far the wheel needs to go inside. You can achieve some of that by going to a narrower and shorter tire, or you can get new wheels with a proper offset.
You can also use a tool like this to help you out.
https://www.wheel-size.com/calc/?whe...scl=2in&sr=0in
Either way, I think your tire is too tall. Unless you nail the wheel backspacing and get the tires inside the fenders completely, they need a 26" tall tire.