I just replaced my pick-up coil on my MSD last week. I take it you have a new pick-up coil from MSD???? Yes, the instructions are a little lacking on the info when it comes to the wiring but not a problem at all. Follow the instructions for replacing your coil, then when you get to the wiring part you'll have to pick out the small grommet where the wires go thru your dist., then since your old pick-up coil is being replaced cut the wires near the connector and discard. Then all you have to do is install your coil, per instructions, reuse your grommet and insert the pins on the new coil in the new connector, be sure to put the right wire in the right hole, they are labeled 1 & 2 (very small on connector) and your instructions will tell you which wire to put each place. Be sure to get your magnet right and the clearance between the new pick-up coil and inner gear right. The instructions will cover it all there. I took mine out of my engine but I suppose you could perform the surgery with the distributor still installed. As far as for the lower gear, it is a press fit. You will have to remove pin, then press the gear off and press it back on, BUT you should not have to do this when replacing the pick-up coil. My old pick-up coil had some very slight build-up around the connection not seen until I got it out causing some erractic timing flucuations and seems to be a problem if you engine sits outside alot, not ran for extended periods of time, ran in wet conditions (mud truck), high humidity areas or just plain age.