The gear is held in place by a
        roll-pin and has to be knocked out. Here I'm using an 1/8 straight punch
        to remove the pin. I put the distributor on a couple of 2X4's to get it
        off the bench to keep it from getting damaged.  
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      The new gear is made by MSD and comes
        with a new pin so I will be using it. The old one was still in good
        shape but because it was new.....why not. You can see the end of the
        shaft that has been machined which is hidden by the gear. This part of
        the shaft drives the oil pump when the distributor is moving. In other
        words, as the camshaft rotates, the cam in turn drives the distributor
        and oil pump.  
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      I slid on the new gear and placed the
        new pin up to the hole. I used a 3/8 diameter punch this time to press
        the pin back in. The reason for the larger punch is because it has a
        larger area on the bottom where they make contact which helps in not
        slipping off the pin while hitting it with a hammer. I went slow here
        and only hit at a time, then repositioned the punch and then hit again.
        The last thing I wanted to do is hit the soft gear and ruin it. This
        whole gear swap only took ten minutes and was easy. Hummm....I wonder if
        I missed something because I didn't run into any problems. Nope....got
        lucky this time!! 
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      The next thing I'm going to do is
        change the timings advance curve. This distributor doesn't have a vacuum
        advance like most do. Instead it has what's called a mechanical advance.
        The advance curve is very adjustable with the aid of different springs
        and bushings. The springs that were installed by MSD are the heaviest
        ones they make and will make the timing come in to sloooooowwwww. I want
        things to happen sooner so the springs have to be changed.  
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