Vacuum advance

RRR,
Many of your statements in post 72 are incorrect.
The first one is that M & P vac adv will not yield the same results, as described in the posts 67-69 I noted, is wrong. Period!
Also, Australia did NOT have different engines to the US. All GM cars that came to this country, Chev, Buick, Pontiac etc had US built engines.........& most had MVA until 1968.
There were a few locally designed/built engines. In GM, the inline 6, 253 & 308 V8s.
Mopar had the inline Hemi 6 cyl. All other Mopar engines were fully imported & built in the US. Ford had a locally designed 2V head for the Cleveland V8, but all the other V8s were fully imported like GM & Mother.
While I might live on the 'other side of the globe', we breath the same air & use the same gasoline as cars in the US.