They either bolt in or there is a slight modification. I believe only 3 holes line up. Don't quote me, but I don't think I'm far off from the truth. A few on here have them in b14's. Maybe they can chime in.
Bend the two fronts down 90degrees drill out the right bracket from the spec v and use the b13.bore out the holes slightly and use low profile nuts so seat will slide.rears. The bottom fits the back part doesn't will have to improvise to get it to work