After some more research I've discovered Lucas Australia distributor 62941129 was originally configured for a six cylinder vehicle and was specifically a later fitting for the Austin Kimberley E6 twin carby model (manual and auto).
If anyone has one of these that is configured for a four cylinder vehicle then the cam and cap (and maybe other internal parts) have been swapped. Nothing wrong with that as most Lucas distributors share common parts. In this case a non-vacuum advance body like this can be used for various 4 or 6 cylinder applications, although the part number stampings on the outside will then be incorrect.
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Lucas AV5 p13.jpg
Thanks very much for that, I was just going around in circles. The drive dog and rotar button also don't line up, but it would still run my motor, thanks, Reddog.
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Distributor 62941129.jpg
