Unless you understand schematics and can deal with wiring, get a complete dash with wiring from a 70 or 71; there are no moved wires in the bulkhead between these years. Also try to get one with A/C if your car has A/C, if you dont have it get a dash from a non A/C car. Again, that is unless you understand wiring, because the power feed for the blower motor is different between the A/C and non air cars. If you get the right dash with wiring (idiot lights) its a bolt in swap. If you get a tach dash, you will need to do more work, not hard but not as simple as the standard dash.
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Dave (NY)
70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
72 chevelle
55 chevy prostreet
69/71 camaros
TC member #493