The yellow shell is left hand drive & as this is the restoration item, best to stick with it. Both are MKI's & should have body numbers on the bonnet shut panel ( if they haven't been changed).
All though the donor shell it R/H drive, the shells are basically the same.
It will probably suffer from the usual corrosion areas ( basically every where). If you intend to restore it correctly, then strip it to a bare shell & get it shot blasted.
This will more than likely show many more areas of corrosion.
But it will pay dividends in the end & don't throw anything away until you another item or it has been refurbished.
In the end it's up to you.