Used Wiring Harnesses

brand new std 66 a-body engine-lighting harness is 235.99 on Wednesdays they offer 25% off of that. https://www.yearone.com/Product/1966-74-a-b-e-body/hu270a

brand new 66 harness modified for electronic ign and later updated voltage reg/alt 167.99 same wed discount applies.
https://www.yearone.com/Product/1966-74-a-b-e-body/hu270am