Doc here,

imp:
Are the systems compatible? Is one digital and the other analog?
If compatible, you will need a diagram for both car and Dash..
You will then need to draw a third diagram of the wire function from the dash and the corresponding Vehicle wire..for the graft.
EXAMPLE:
Dash wire.......Function..........Termination.......
====================================
Gray.............temp sender......temp sender on engine
blk/gen..........Oil pressure.......oil sender.
Red ..............dash power.......20 amp fuse "Gauges"
and so on...
until all the dash wires find a "proper home"..
Be advised your new dash MAY require the BCM, or body control module from the donor car...which means you MUST graft the computer system in...or buy an aftermarket "Kit Type".
Doc

imp: