Not sure if this is what your after, but here are two parts of what your missing I think.
https://www.ebay.com/itm/1978-Monza-Sun ... 1438.l2649
https://www.ebay.com/itm/Fresh-Air-Inta ... 1438.l2649
All I have is factory v-8 stuff. Really like the look of your car, always wondered what a 4 headlight nose would look like on my towne coupe. Seems like it would be slightly better aerodynamically than the flat nose of my car, lol.