Street Gear Poll

Street traveling gears, 2.76 - 2.94
Street gears, 3.23/3.21 - 3.55
Street strip gears, 3.91 - 4.56

Strokers can use the low side of the range.
O.D. Trans cars can go to the high side of the range.
The biggest thing you or anyone should to achieve is getting the engine to cruise at a rpm that it is happy in. This, IMO should be an area where best mileage is found at a low rpm just under peak torque.

This isn't so advantageous for big cam engines since peak can be a bit high if not ridiculously high. But the idea of hitting the gas and going immediately is the idea. No waiting. Just GO! And right into the beginning of the HP curve that goes up and up.

The engine size, cam installed help dictate this ratio and tire size. Moving up or down a size changes the action/reaction of the car and it's feel. That choice is drivers choice. My choice for my solid cam street strip '73 4spd Cuda w/a 248* duration @ .050 is 4.10 w/a 26-1/2 inch tire on the street. I say jump Judy and it responds with how high up on the way up. If it were a overdrive trans, it would be 4.88 & a larger tire.