G'day Sooty,the best people to talk to would be Marks Adaptors,you could send them a fax on (03) 9706 8148.They are in Vic but may have outlets in your area.They do a V6 conversion that uses a Commodore engine and Auto transmission for your vehicle(should be prety reasonable price from a wreckers) the basics you would need from them would be an adaptor plate for your transfer case and engine mount kit.Don't worry about the Toyota people,I too stumbled around in a blind state of ignorance for fifteen years before I saw the light and traded UP to a Landcruiser Recovery Vehicle (GQ Patrol).I hope the above info is of some use to you.