Did you get the 2.3 or 2.0 DOHC 16v Ford Galaxy / Scorpio engine out there ?
Based on the same block as the 2 litre DOHC 8 valve motor you already have, everything should pretty much bolt on if you block of the oil feed to balancer shafts in the 2.3 sump
If not why not do what Ford did in South Africa and use the SBF ?
Plenty of room in there for a 5.0