Heres the pulley
[Linked Image from img163.imageshack.us]
[Linked Image from img692.imageshack.us]

Bit hard to make out I think it was about 2-1/4 deep
[Linked Image]
But theres a washer at the bottom
[Linked Image from img651.imageshack.us]
Over all the pulley is just under 3" high.

I was trying to work out how i was going to put a 1" pulley on a 7/8 crank.
Then when i was measuring i worked out that it comes apart.
Big hammer and some hard yakka.
[Linked Image]

It was a pretty tight fit, the hole you can see is where the grub screw was holding the collar inside the pulley.

Now i need to work out where i can get a 7/8 insert.