Which horsepower version will you be purchasing? 435HP, 410HP or 320HP...First off, you'll need to change your motor mounts, you'll need the mounts for a small block chevy...I don't think these engines are equipped with a mechanical fuel pump so you'll have to run an electric fuel pump...These engines aren't equipped with the water pump so you'll need to purchase either a short or long style water pump along with the correct short or long style accessory brackets for a small block chevy...You'll also need to purchase the correct crank and water pump pullies for a small block chevy...You may need to reroute your existing fuel line...You may need to purchase the correct power steering pump for a first gen Camaro...Remember, your Firebird is going to be Chevy powered so think of your Firebird as a Camaro when you need anything engine related...You'll need belts and hoses for a sbc Camaro...You'll need a fan and spacer for a sbc...You'll need headers for a sbc Camaro...You may need the correct starter motor for your new application...You'll need the water neck and dipstick tube...Remember to use a fan shroud for a sbc Camaro...If I left out anything, I'll add on later...It's a challenge, but it can be done!