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Sorry, I'm going to step on some toes here, but mis-information has to be corrected.
Ultra High Compression does not make it a Starfire engine.
The low compression motors Olds offered in the base 88 models (depending on the year) was around 8.5 to 1 (that's an estimate, I don't have figures in front of me).
The Ultra High Compression motor was around 10.25 to 1 and was standard in 98s, Super 88s and sometimes base 88s (again, depending on the year). This was not the Starfire motor.
The Starfire motor was 10.50 to one compression and was standard and only available in the Starfire for the first two years. In '63 and '64 it was also available on the 98 Custom Sports coupe, which included dual exhaust, bucket seats and a console. I think the Starfire motor was optional on other '64 98s. I'm not sure about '63.
Just because the air cleaner says Ultra High Compression doesn't mean it's a Starfire motor.
Paul
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