Have the Diff out of #220 to replace the seals. There is a crude vent tube brazed on to the diff cover. Is this stock or a modification? It does not look to be very effective. The tube is broken and I'm thinking of just replacing it with a plate. Your thoughts?
I've got one of those too so at a guess, I'd say it was stock. I had the diff re-built with new seals a couple of years ago by a reputable engineer shop that specialise in performance and race cars. They didn't have any adverse comments to make about it so it was left as was.