The bellhousing that adapts the type9 to the v6 essex is a standard Ford bellhousing (it has now been remade in alli) It was fitted to very early Granada's with the essex engine when the gearbox was in 4spd form, ie before ford modified it into a 5spd. I have a type9 fitted to my capri ( 180hp @ wheels) and its proved ok, saying that it does have a bolted layshaft, i have heard of the problem with 5th gear on the highway, but to combat this i've overfilled the gearbox and every now and again drop down to 4th for a while.
Hope that helps.