Widening 13'' stamped steel rims

[voverys]

Hello,

I'm from Lithuania and I couldn't really find much information about my 85' Volvo 340 until I came across this great forum!
I have decided to widen my original steel rims since it looks very good and is fairly cheap.
Maybe somebody would know how much an original 13'' steel rims should be widened for perfect wheel fitment? I believe the original width is 5j

[classicswede]

Most widen them to 7J