i have a 73 nova, which is basically the same as the 74, and i beleive that the 72 and before grill will fit, but will have a small gap on the top near the hood. also, if you replace the grill with a 72 grill and you want parking lights youll have to replace the bumper with a 72 as well since the parking lights are in the bumper of the 72 instead of the grill liek the 73/74. the mounts are different for the 72 and 73/74 i beleive, not sure though, could be wrong. sheet metal is all the same for 70-74 so whatever you want can go. the doors are very slightly differnt so the other panels may not fit correctly, not sure agin though. are you looking to transform your 74 to a 72 clone?