Holley/Demon Carb stumble

PRH said
Holley 9381.

At some point, the 1.560 x 1.688 configuration became the NASCAR standard sizing.

The Street HP 850 also uses that sizing.

Not a fan.
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Thank you, that’s the one.

BTW...any chance an annual booster would help that demon? It dang sure didn’t help the 9381.