My thoughts - there should be enough bulk imports of factory crate engines that the likes of Ferntree Gully Holden can sell heaps at a lower margin and make it worth purchasing locally.
Performance aftermarket crate engines - I've seen the pain that Spook went through, but hopefully the guys responsible / aware of that will take ownership. If you buy from Keith Craft, Jon Kaase, Shafiroff, Fast Times, Brent from
www.b2motorsportsllc.com (a prolific contributor to this forum) and a few others who value their reputation, I can't see you having an issue. These guys can send over an engine fresh off the dyno. Run in, tuned, and ready to go....FAST!