Went through the opposite problem putting a 292 into a Chevy II. We took a piece of 1/4" plate to mount the pivot ball and in our case used two existing holes in the block with a couple of spacers to keep it parallel to the pan rail. If your Chevy II 230 has only the boss for the pivot, you may want to make a couple of small bracket to connect the plate to pan bolts to avoid any possiblity of the plate moving.
