Have a 78 Omega V6 changed to 455 and now with a 403. I like the sheet metal on the earlier ones better. 76-78 have the one piece grille in the header and 73-75 have the 2 grilles in the header panel. The 2 piece grille looks more "Oldsmobile" to me. Not so much like the Nova and Ventura. I found a complete front cap for a 74, fenders, header, grilles, hood and radiator support. It looks like I could swap this one on to my 78. Anyone have any idea if this will work?

 

Not even close. The 73-74 cars are a different generation than are the 75-79 cars. Sheet metal does not interchange.