Can you put a formula hood on regular firebird?

No, you can't just put a Formula Firebird hood on a regular Firebird without significant modifications. While the general shape might seem similar, the hoods are different sizes and have different mounting points and structural features. You'd need to do extensive bodywork, potentially including modifying the hood, fenders, and even the firewall to make it fit. It's a major undertaking, far beyond a simple bolt-on swap.