It was almost certainly made to fit a Holley carb onto a Holden "Grey Motor". The recesses for carb pad bolts are testament to that.
LYNX are not very cooperative now. In the good old days, they ran their own machine shop, had tech advice, sold a whole bunch of locally manufactured parts.
Now, they are selling off old stock, want $25000 (and higher) deposits to re-found parts, generally ignore correspondence where possible and don't do much to help themselves. Were they a horse, you would have the front-end loader idling and the screens ready...
It's a shame; they could have moved with the times but perhaps for reasons of autocracy or incompetence, are a dying ember. Sound like Clifford? :roll: