Thank you both . Mine has been welded once earlier in its life and recently for me. The problem is the thread is tapered and as you tighten the pipe fitting it puts undue pressure on the 50 year old cast iron causing it to crack. One option is to bore the thread out and re tap with a non tapered thread, using an O ring to seal the oil.
I rang the factory and they advised no new stock but may have a second hand one. Still waiting for confirmation.
Elko Performance Parts in Melbourne (chrysler specialists ) know of a kit out of the USA that would have possibly the right adapter, but you have to buy the whole setup just to get the part you need.
The JOYS of bristol ownership.
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