Barry,
The hooks are not necessary on the 140 chassis and if the cluster has never been out since mfg'd. then probably stuck.
There is a chance of cracking the face if not hooked correctly and then EXPENSIVE. Here is the easy way:

On the top left of the dash, remove the speaker grille. Then remove the two screws on the bottom holding the HVAC vent duct. Pull the sections of duct out, two or three, and then put your hand in behind the cluster and PUSH it out from behind. There are two large electrical plugs attached to the cluster, no speedo cables etc. Reassemble in the reverse manner and all is complete....and nothing broken!
I think if you do a search on this repair, there is info about it.

Good luck,
TobiasMB
4 MBs