hello I am doing the same thing, 65 with a 90 efi. don't really understand what exactly you are asking. I messed around with the 90 harness but couldn't get it to work so now I am trying with a 92 should be easier since most of the info is based on it. are u looking a 12 volt from ur 65 harness? I would think from the red/blue wire from the coil, also going to the brown wire in the solenoid.