E21 rear suspension thinking

[Flying Vinta]

New to this forum, building a fast road/track day E21 from bare shell. Restoring and strengthening shell and exploring suspension options. I am considering a complete F20 rear subframe conversion and wondering if anybody on here would have any comments or experience around this? Any input appreciated. I know the rear track would be approx 6.5" wider in total but arches will be dealt with for wider wheels anyway.