the 2.9 saph was a lhd thing later on in the end of the year run out models
the dohc cars were all ghia spec'd and were available from the 90 spec facelift onwards

there were plenty of them and they use the same gearbox as the cossie 4x4 as well as the same props front and rear
the diffs are 3.92:1 items and 7 inches wide at the rear
you can't really use the rear hubs, or the fronts to be honest, as they won't fit the cossie (they will but you'll be fiucked trying to fit cossie stoppers to them

any more questions just ask