Ya that's what I meant to say - '91 an earlier.

Ya I saw those two wires but I also noticed the wire from the (TBI)ECM labeled "vss input". I have a diagram of the cluster connector that my friend gave me I just don't know which wire needs to be connected the the speedo output from the new ECM. I kinda figured someone had done this already. If not, I guess I'll start connecting wires til it works.