What gear ratio for a street car w/occasional track use?

Hah, yeah;
I remember one-time,piling four mature men into my 367 Barracuda,for a quick spin around the block. My car was already fat at 3650 pounds, with just me in it. Now add nearly 1000 pounds of giddy 50-something year olds, and I knew as soon as I slipped the clutch out, there would be no showing off on that ride,lol.