At least through '73, "Formula" had no fender flares, either. Just the big scoops "out front" on the hood (I still have a '73 hood stashed in the shed). They were fiberglass hoods. The '70-'72 had the option of "Ram Air" where the scoops were open and sealed to the air cleaner. They claimed it made power, but the only real advantage I see is the introduction of ambient air instead of hot "under hood" air. Still, those scoops are in better position than the early Firebird "400" and GTO scoops. The "shaker" is the better one. The rear opening accesses the high-pressure area at the base of the windshield. I saw a couple "delivered" with the rear spoiler, so it must have been on the option list.
The springs would have been "big block" Camaro springs. We changed a few small block cars to big blocks, and had to get them. Same in Chevelles...