Chrysler parts book lists part# 2926085 for '70 B body with BB (same part# also shown for '68 & '69). Bill Rolik has one described as "concours-correct " for $137. Maybe compare price and photo to ones sold by Moparts sponsors?

http://www.billrolikenterprises.com/proddetail.asp?prod=2926085-S

If by "different colored red cables" you mean two shades of red, I have not heard of that.