I remember like yesterday when I dropped the Edelbrock intake manifold and 750 Double Pumper in my 73 Monte Carlo (My first car.) That was the day I started blowing up pinion gears. The 2.92 diff would go really fast without breaking a sweat, just don't stomp on the pedal from a full stop. I was always going to go to the Camaro 3.45 but I never did.
What a great Drive In car that was. With the swivel bucket front seats, you could sit in the roomy back seat and still see the screen if you really wanted to see the movie.
After the last diff blew I traded it on the 1983 Toyota 4x4. Not so good a Drive In rig, but great for taking the gals out to the country.
I expect only we Boomers know anything about the Drive In Theater. Speaker on a pole or the really cool FM audio on your in dash 8-Track.