I don't know about that... the front axle, with the trackrod wanting to occupy the same space as the springs and sitting below the axletube is just a bitch... I would rather opt for 40/60/70series LandCruiser axles.. Same steering arrangement as a Series, close to or wider, disc brakes, stronger, offset rear diff..^ what he said.
Get coiler axles.
That ain't necessarily so.The wheel bearings themselves won't fail, but series vehicles have different spindles to D90s.The hub seal ring on the spindle of a series is replaceable.which makes the spindle weaker. D90s etc have seal rings that are an integral part of the spindle and therefore stronger.I've seen a few series spindles shear off at the flange on vehicles with wide offset rims and a bit of front end weight such as a winch and bull bar.I have also seen a few swivel balls split at the flange, mainly on forward control Rovers, but also on wide wheel heavy fronted conventional vehicles tof course we do have some long distance heavily corrugated outback roads, which are the main cause of these failures, but whether or not the OP has issues after fitting spacers or offset rims depends on a few factors.Wheel spacers is a option, and no Ben, you won't experience premature bearing failure, I know of several D90's that have been running them for 5 plus years without a issue.
I made the spacers and ran IFS hubs on a 60 axle (about 61.5 width) and ran an FZJ80 rear with an e-locker, that worked great but the front axle was a little on the weak side for bending with a 6BT as an engine. Another thing you may want to look at is the Toyota diffs actually fit in the Rover housings with some work, there are a couple of threads on here.the idea is to use the FROR tacoma brake kit on a 85' mini truck front and go Full floating in the back with a V6 diff , and then change a few more things along the way.......:evil: