Timing is easy. Start by taking the timing light, and hooking the positive and negetive clamps to the battery. Then take the small clamp and hook it to the number one (first on the left side of the motor) spark plug wire. After ths you need some more tools. Under your distributor there is a small bolt holding a peice of metal which in turn hold the distributor from spinning. You will need to get a 1/2 swival socket on a few extensions to reach this. Before you unbolt it, pull the small plug on the wire that is attached to the harness for the distributor. Then start the car and unbolt the bolt (not all the way out, just enough so the distributor spins). With the car running point the timing gun at the balancer located at the bottem center of the engine (poitn at it from the passenger front of the car, in front of the alternator). You should be able to see the numbers on the balancer everytime the number 1 cylinder fires. Then you spin the distributor (I forget which direction does which) to get the right timing. My made most power at 16 but they are all different. After your done, put the plug back in, tightent the bolt (dont move the distributor) and see if it pings. Find the highest optimum timing without pinging (the best is to just hit the dyno and see what timing makes the most power) and run it!
The car should go mid 15s, and with the 4.10s into the 14s.
The speedo gear is located in the transmission on the drivers side. When you buy gears look in the catelog for the speedo gear and get the appropriate one. It will still be slightly off after this (more so with 4.10s then 3.73s) but it will be MUCH better than leaving the stocker in there!