Can someone recommend a good tune for the 69 Camaro FE?

Hello.
I want to do some laps around Daytona with said car, as it gives a nice credit boost if you go over 150MPH.
That being so, can someone recommend a good tune to make the car go as fast as possible whilst keeping stable?
I tried messing round with the gears but that just made it worse, so maybe someone else here has more of an idea than I have lol.
Many thanks in advance :slight_smile: