Need help with gear choice

With those two choices, I would use the 3.90. The RPMs will be high, but the 3.21 is not a good match for that converter, either. The 3.90 is. If the engine is stock, why do you even have such a converter in the first place? It would run much better without it.



Thanks for the reply! To be completely honest I am cheap. I needed a converter to get the car on the road and a friend sold it to me for $50. I do plan on replacing the stock cam sometime this coming winter.