HQ SS would have a MPH speedo, KPH was 1974. I guess the argument is over 120 and 140MPH versions.
I wonder if it has to do with whether you have Flexdrive or VDO speedo from factory?
There is a lot of genuine HQ Sandman's out there with 200KPH speedos.
What brand do you have?
Similar issues go on with EJ/EH speedo's between AC and VDO variants.
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