Delco CS144 Unit for Cadillac. This is Used on Cars wo/Heated Windshields - There is No A/C Taps on the Rear Housing (Like the 7966-2 Has). The Front Housing Has a Threaded Top Mounting Ear. This Unit Uses the #413 / #430 Regulator (They Interchange) and the 1269 Taper Pulley. All are 2:00 Plug Position. The 8175-11 (124A - #425 Regulator) and the 8163 (124A - #429 Regulator) Look Identical to the 7969-2, Except for the Pulleys Used. The 7985 (124A - #408 / #428 Regulator), the 8183-5 (140A - #412 Regulator), the 8112-5 (140A - #429 Regulator), and the 7684-11 (124A - #425 Regulator), are Similar, But Use the Unthreaded Front Top Mounting Ear.