Instrument panel is just a snug fit into the hole in the dash. Problem mentioned earlier about the non-adjustable wheel is there is no room to slip the cluster out with the fixed position steering wheel. If you have adjustable wheel, you can lower it (or is it move it away from the dash; whichever) and come up with enough clearance to get it out. Here is one link I found, probably better one out there somewhere:
http://www.peachparts.com/shopforum/showthread.php?p=176202
This is electronic speedo, so no speedo cable to worry about. Need to obtain or make the tools to remove it, usually a coat hangar will be OK to make the tool from.
I wouldn't replace ALL the bulbs, but the ones I mentioned and also the regular illumination bulbs might be a good idea, there are only 2 or 3 of those. I wouldn't bother with replacing all the little warning light bulbs though.
Gilly