The March '08 Hot Rod Magazine has a tech question about compression ratios and cams for a turbocharged, Hillborn injected slant six.
Opposite the three column answer including input from Kenny Duttweiler - part of the "Pit Stop" section, page 118 - there is a nice full page photo of a slant six in an early-60's dragster. "Dart 6" "Dragmaster"
I noted that the dragster has 123 C/D painted on the coul. Perhaps 123 CID? Was 123 a dispacement someone came up with?

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

123 is the car number.
C/D is the class the car ran "C" Dragster

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Thanks, Charlie!

It's a good shot of the car's engine and cockpit from high in the front.

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO