[Aus78Formula]

I believe the valves were supplied by Kelsey-Hayes and did similar vehicles. I don't know that any were the same part or substitute, but may have found their way into a few non-popular models for collectors. Of course, using the same casting doesn't tell of any internal tweaks, but they'd need to identify the differences somehow. The threaded lines may not be the same either. It may be easier to reverse-engineer, find out which models use the same brass block offered now and if internals etc match.