1) I have a Y1 cable trans with a 4.2 final which is not good for all motor. What can I do to improve it short of replacement?

2) I have two YS1 440 cable trannys. How can I tell if they are a USDM 90-93 Integra or from a 92-93 GSR?

3) On the YS1 trannys, which is better for acceleration (with the FD staying the same), lower or higher numbered gear ratios?

Thanks!