Re: Clevo History Lesson...
In other words;
US 351 4V motor from XW till mid (manual) XB range.
US 351 2V motor from XY/ZD till '74-'75 XB (Australia imported all of the US casting for the clevelands in 1974). I have a heap of XB/C blocks and they all have 'C' cast into them next to the oil pressure sender. I don't know whether or not these late 70's blocks were cast here with an un-changed cast from the US or Ford Oz were still using US imported blocks?? However, I have an '82 Falcon Nascar block with 'GF' (Geelong Foundry) cast next to the oil sender.
XA/ZF Fairlane had the first 302 2V engine. If you look at the casting numbers you will note that the 302 stuff (cranks, heads & rods) have AR as part of the prefix. Now, the question therein lies, was this stuff made here or in the US? Also, were the engines assembled here from US/Aussie or US/US gear, this, I don not know.
Hope I haven't given more questions than answers