340 performance?

sledger46 said
3.21 to 4.10 = .25 seconds in the 1/8, might be a bit more in the 1/4. A "good" torque converter could easily give .5 second in the 1/8.

Converter isn't much good in a 4 speed car. :)

But yeah, I agree in an auto car, huge difference is possible.