It's alive!
Parvalux took their time delivering the motor, a bit frustrating but then for a 35-year-old one-off job I guess I should be glad it arrived at all!
The motor was exactly to spec, as they said - however, the spec that Parvalux made them to is different to as NBC bolted them to the unit, I had some work to do:
- Enlarge & tap four holes in the top of the casting to M5
- Cross-drill the shaft to take a roll pin that holds the drive gear on, I used a 3mm drill bit as that's what was about. Had to source a 3mm roll pin too

- Chop the end of the shaft off once the drive gear was on, it is supplied about 1" too long.
Once that was all back together with the gearbox, it just remained to get the wires the right way round (there are no polarity markings) and it's back to full health.
Now to fit some neons, slam it to the deck and bolt some spinners on