Hi,
As fas is my knowledge goes the diameter of the old top bearing (3 bolts setup) is a it smaller than the new top bearing (2 bolt setup).
So that should fit.
The coilovers are indeed the correct ones, for the 3 bolt setup. Is you want to use these, you will need the 3 bolt setup spindle/axles/swaybars/tierods?
Again, I'm not sure i'm 100% correct.
Other option can be wider fenders/wings al around and use spacers on the back to compensate
With the 2 bolt setup it is easier to convert to Porsche brakes in the future