O.K. here it goes. I am looking to change out the stock gauges in my 87 /forums/images/graemlins/k5.gif with a complete set of autometer gauges including trans temp in place of the factory clock. Anyway when I change the speedometer I am confused as to which I should use elec or mech. My speedo is mech but has the vss in the speedo autometer does not. They have electric with a hal-effect adapter for gm cables can this send appropriate signal to ecm or am i just S.O.L on this. Any help and all help is welcome.