Just to add a quick note:
I pulled my cluster about five minutes ago ('92 B13) and the speedo cable under the dash is hidden inside a black square tube that looks exactly like an air duct. I had to reach up by the gas pedal, counterclockwise around the tube, and follow it to the rear of the cluster to unhook the cable. Buckets of fun.
And while I've got it out, back of the B13 cluster.
[IMG]http://farm3.static.flickr.com/2295/1951778866_d41**5f36b.jpg[/IMG]