Hi A12 Grunt,
Thanks for your input which is news to me as I was always of the understanding that the ultra close 56a box was a 5 speed.
I can't really add to what I have previously said- that box was very, very close in the ratios and had an extremely long 1st. I would have thought that it made sense for a really close box to have a big long first then that gives to ability to close all the ratios up in the rest of the gears but then I'm a wool exporter- not a mechanical engineer...
The box to the very best of my knowledge was all Nissan and I ran either a 3.9 or a 4.1 ratio diff.
Bettanty's actually only made the gearkit for the 60A box for Re Cooke- one of 5 only ever made for him.
There are a number of other mods that Cooke did to this box including selector forks.
The box is presently out waiting for my mechanic to put it back together.
The cluster is all 1 piece with 2 helical gears at each end and 2 straight cut gears in the middle.
Hope this answers all you need to know.
Cheers
Dave