Hey there, frozenrabbit
What bubbaxxxx said
That's right.
"Stabbing the dizzy" is sadly also way of potentially turning a hex drive if you don't be gentle.
Turning a hex drive
in to a macorini drive
They really should put stickers on this stuff in the price check section
to stop an international "knot in wood" gnocchi incident....
https://www.youtube.com/watch?v=Gg_yzRWy9HM
https://www.youtube.com/watch?v=VX128MzM64s
Although they are hardened, and machining will leave exposed unhardened end, its not an issue unless its been burred or miss directed.
viewtopic.php?f=1&t=72783&p=559468#p559468
/viewtopic.php?f=3&t=9798&start=0
Sizes:
for US 200 after 1964, all the same 5/16" drive 65 to 1983
for 250 US, the 5/16" drive is 0.393" too short for a Aussie 200 log after 1970, or any 200 or 250 cross flow
for 351W 8.19" length by 5/16"
for 302C/351C/351M/400 9.34" length by 5/16", and you have to cut it to fit a US 200 or US 250
You'll find any hex drive won't even be close to a 52 rockwell harness, these things were spat out of the susage machine with the strength in the manufactoring, not in the materials design.
Its only under load, when the edges are rounded, or the wrong drive is placed in the distributor, that it'll chuck a mental.
That happens a bit, as there are both 200 and 250 hex drives, with different lengths.
Some times, a guy in Australa or the US might tick an ebay supplier, and get the tall deck or short deck 200 hex drive, which is application specific. The lenght varies on the hex drives.
The Aussie stuff was designed to integrate the existing US inventory into the existing Australian made inventory, so if you have, say, a hex drive for a 1983 Ford Fairmont i6 six, you could end up with any one of the US or Australian in line six parts.
The Aussies down graded the out side hole pilot diameter in October 1980 back to 485-490 thou from 525 to 530, basically pre 64-1/2 Ford style.
The so called "Duraspark" Australian distributor is actually based on a 1959 Dodge Truck in line six part, which was also used in Holdens and Falcons, then converted to electronic in 1973 by Chrysler Australia for the Hemi 215/245/265, and then, for both the XT5 2.85/3.3 Holden and the late 1980 3.3 and 4.1 liter X flow engines.
It reverted back to the pre 1964-1/2 US pilot size.....
This was so the GM Holden and Ford Falcon/F100/Cortina six item could be sourced from the same "white box" Robert L Bosch Australia supplier.
Australia is a small market, so quite often, Chrylser, General Motors, Ford and even AMC Australia used to use the same white box supply, and just change the hard dimensions to suit the parts.