Step 13.When dry, carefully push the black insulation pieces down to the cap, making sure that they all sit on the cap. After you make them flat with the cap, add a dab of glue to the boots and spread evenly to hold the boots together. Do not let the glue get on the wires. If it does, you will not be able to separate the plugs and it will be a mess! Glue the distributor stem to the already drilled hole on the engine block. At this point, you should have a cool engine block with a polished distributor and colored wires with black boots on the ends sticking out like an alien having a bad hair day.