OK, went out to check. Not easy to measure a curved cable with a metal tape, but my 63 Valiant slant six cable appears to be the same length as the cable in my 67 Barracuda 360 - roughly 17 inches from firewall to the carb attachment. The cable in my 65 Barracuda (340) is only 15 inches. I don't think a shorter cable would work on my slant six. Different year, different linkage, who knows?
View attachment 1715663699