Easiest way is to decide to go with AMD's 1971 fenders as well....otherwise you're getting into cutting and welding on your 74 fenders
...and if you do the front fenders, and tail panel, you might as well change out the rear quarter marker lights.
Yep, not cheap. I say keep the '74 look, and go with 70-72 bumpers.... much more cost effective. Maybe add the V21 hood treatment for some pop.