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I found black coated fully threaded headstuds holding my 3.0L together. I'm pretty sure they're 993 studs, as I haven't heard of any others being fully threaded. They are not magnetic, so I believe them to be dilavar. I'm going to reuse them.
There were no dilavar studs in 1973. They were all steel back then, and are fine to reuse. The turbos got dilavar studs when they came out, and the n/a 911's got dilavar studs on the exhaust side sometime in 1977.
Rob
1980sc
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