One reason I asked how he plans to get the I.D. in the bushings is the dimensions he said he needed for the crank and wrist pin and the tools he has availible. If he has drill bits that will give him the correct I.D.s, then pressing them in as a solid piece and drilling the I.D. will be best. If not, then he will need to use the lathe to bore out the I.D., then turn the O.D. to match the hole he has drilled in the rod end, and use a brass or wood mandrel to help press the bushing into the rod without deforming it.