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I've seen in a couple threads that engine blocks with an * on either end of the block number indicate a high compression engine. I've got a 72 that I bought from the original owner. He did not do an engine swap. My engine has the two asterisks on it. How can this be unless the double asterisk doesn't really mean high compression. I thought 71 ushered in the era of low compression engines. I've not had the head off so I don't know what the pistons look like. Since it has the oringinal sickly Solex on it still (and it is sick - no choke for instance), it runs fine, but it's not real fast. I also checked the Opel Club site. They have a list of difference between model years. My 72 has only some of the differences that they say the 72s had. So I'm guessing it must be an early one, using up some old parts. But I'm curious about the double asterisks.
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