Speedo swap degree of difficulty?

[Ken Pearce <kpearce@engr.ukans.edu>]

What's the degree of difficulty on swapping out a speedo on a 68-2000?  

        a.) 1-2 beers
        b.) 6-pack
        c.) 12-pack
        d.) we should have gotten more beer

My odometer/trip-meter quit working, although the speedo still works.  I
have another speedo of unknown condition that I might try out if the swap
isn't too hairy.  Is this one of those jobs where you have to have a small   
child around with tiny hands who also knows auto mechanics?  

Thanks in advance,

Ken Pearce, 68-2000
Lawrence, KS