It would make it easier but you don't have to.
1 - U need to remove the radio.
2 - pull knobs off of the heater/air unit. pull it out, remove connections
3 - Now you need to find the screws holding the facia on
- there should be some where the radio and heater bits were
one behind the light switch
and maybe a couple at either end of the facia
(tip - it will just fall off when you've found all the retaining screws , i.e dont YANK IT!
now two screws at the top of the clocks need removing
then tilt clocks forward, reach behind to disconnect the speedo cable
(this can be tricky, it has got a plastic bit you have to press while you are pulling at it)
thats it, apart from the wireing plug, pull it out. and you may have a vacume pipe, pull it off
all that with a phillips and a lot of swearing!!!!!!!!!!