Worth the effort.
Can then drop gearbox out down onto rollers in one lump. I'd do it.
Support the gearbox, cut the old xmember out, weld fittings for new one in. Fiddly with gearbox in place, but it could be done.
Can then drop gearbox out down onto rollers in one lump. I'd do it.
Support the gearbox, cut the old xmember out, weld fittings for new one in. Fiddly with gearbox in place, but it could be done.