Hi I not running one on my present Firebird but I did have one on my 65 Chevy Nova that I had about 4 years ago. I bought the Nova as a roller and bought a complete running SBC 350 with a Edelbrock Pro Flo fuel injection system. It ran great the motor was 425hp with Ali heads built to an Edelbrock spec. It had the hand held tuning device and you could change various fuel settings. I ran the car for a year just drag racing ran a 12.55 1/4 mile.
I would recommend this as a brilliant system and it's easy to tune and it ran great. When I bought the motor with the pro flo we were a bit worried about how to wire it but it was so simple about 3 wires. We did have to get a fuel pump for an injection system as you will need more PSI to run an FI system.
67 Firebird 350, TH350 auto Convertible, B&M 3000 TC, 4bbl Edelbrock Performer carb and intake Black Jack headers,disc brake conversion. 10 bolt chevy axle with 3.73's and B&M Rachet shifter.