In russia intercept vectors are not uncommonly more than 90 degrees. Luckily with modern efis aircraft with good "LNAV" it's very easy to do still, you just program the box and make sure your ground speed isn't to high and keep on sipping coffee.
On jurassic aircraft though, you need to be far away or use the NDB/VOR bearing needles to make out your relative bearing for a proper timing of the intercept turn.