We just sheared our 460 Ford dist. gear pin this weekend! It's a Crane roller cam and special steel gear, really wore the teeth on dist. gear too so we will need to buy another gear) Anyway our dist. gear looks like it has been rubbing too much on the block boss. How does one shim it up to raise it slightly to decrease pressure on the boss? Do you shim under the gear or under the dist. flange where is enters and rests on the block. Where do you get the shims. Lastly, does the worn gear teeth mean dropping the pan or are the metal particles so fine it does not matter and filter will catch it thanks