Gear Ratio and RPM deciding on gears

Road use?

Track only?

Details matter. ;-)

I want a hot street car that I can take on the track a few times a year at most since I don't have a lot of money to replace parts etc. But I would like to be able to ride a decent torque curve around town and the torque of the 340 starts above 3000 probably more like what I show in the graph at 3800. Wouldn't 4.11's have more torque around town than a 3.55? I don't plan on leaving the Phoenix metro area and tour with. I DO want performance and the 2.71 I have is a dog with the torque converter as is. I plan on working with Lenny AFTER I get the rear ratio in. There is always a split on what rear gear ration is best. All I know is I have a 904A 3 speed trans that idles at 35MPH lol which is not good.