Quote:

They are all different. 68 Used a different dash pad. It's thin and sticks out more. 69 used a bigger shorter pad and the 70 had the key in the column. I think an ac dash is different as well.



Agreed.....look for a dash out of a 68 Charger or Super Bee. If you change to a 70 there are many differences from the 68 including: all lower pad mounting, glove box door mounting, ignition switch location, upper dash pad etc.
Only way I would go to a 70 would be if you can get a complete assembly to bolt in.

70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts