Nowadays, the split bushings are hard to find. I don't like pressing a solid bushing into the block. It is possible to break that casting there, rendering a costly fix or a junk block. I have been using an old valve guide. An 11.2 mm drill bit and a light hone.....press it on the distributor shaft after the gear is put on. I make the OD about .510, and part it off about .900 long. After press, it ends up .5128 or so. Fits just right, and you have a magnesium-bronze bushing for the pilot. Works good, and no block worries......