Just bought a 5/8" heater core shut off valve for one of my Lincolns. 100% match to stock DeLo. Little more expensive than the single piece tower, but I figured car was worth it: Factory Air #74671 $26 at AutozoneAdvance also sells Factory Air Re: Lambda ECU thread -- have finally removed mine from car (no frequency valve). As far as I know is still good. Am trying to trade with a vendor for spare Bosch plug wire (or two). If that transaction doesn't materialize will make same deal to anyone on list... O2 sensor already given away. BTW: anyone know how much juice Lamda and idle speed ECU's suck up? Am hoping removal reduces alternator load. Have been told onboard electronics are reason for today's big alternators, but I still suspect coil packs have something to do with it. Bill Robertson #5939