these heads actually made in australia?

I have very similar to these just badged Pro flow purchased them bare and had my machinist go through them ,guides and seats were good ,threads were good, had some port work done to them flowed 262@ 600 64cc open chambers were advertised 65cc but had them ccd .Fitted out with Ferrea 6000 Valves , comps duel valve springs to suit the solid roller chromoly 10 degree retainers and locks. Cam is cc solid 20-742-9 Extreme Enerygy XR-274 R. They work well but would never just bolt these in without going through them. Once bitten twice shy !