At the front the brackets are entirely different. The track rods pass through the over-rider brackets so you must disconnect the trackrod ends at the stub axle to fit. The other thing to beware of is that the brackets changed when the track rods went from above the steering arms to below, and in the case of the latter, the hole through which the track rod passes is deeper. It would be essential to check clearance because if you get this wrong, the trackrod will foul the bracket on rebound and it could stiffen the steering enough to cause an incident.
At the rear, the brackets are totally different, but it's a bit easier. The factory sell brackets in the on-line shop to change from full bumper to over riders using the same locating holes. These brackets are not the same as when over-riders are fitted from new, but makes the rear much easier to do.
Some older Morgans, and I do mean older, had full front bumper and over-rider rear, which to my mind looks odd.
But then I don't find full bumpers very attractive, I think it masks the lower front wing lines too much, although I don't much care for the high naked front either, which is why I fitted the spoiler.
