If you don't mind running hood pins, its not difficult.
I swapped a 74 header panel and hood onto my King Cobra in an easy afternoon with a few "beers"
You will need to re-drill a pair of mounting holes at the top of the fenders, remove the hood primary and secondary latches (and the grille supports behind them), and space the top of the rad back to clear the underside of the hood (not an issue for me, since I run an electric fan)
Other than that, its no different from swappingon any other headerpanel, but looks WAY better
