Why not look at a Ford 5.0 L injected or a small block Chev?
Are conversions kits for these available over there?
I think that if you are going to the effort of fitting a V8 to a vehicle that never had one then why not pick a local, common V8 that will be easy to source parts for and easy to warm up if you desire, cam, inlet, stroking, etc.
Cheers