I used a 1 5/8 hole saw in a billet 1/4" piece. I then drilled it again with a
1 1/4 hole saw. I then ground a slight taper to the outside...tapped it in and voila...a distributor bushing. This should not have a slip-in problem as deeper in the manifold distributor hole it is a slightly larger diameter. After I installed it...with a bearing driver, I used a die grinder with a scotchbrite pad to make it perfectly level for the distributor seat gasket. It took a while though, and as good as it felt to complete it, I probably would have purchased one if I could have.