Hola In 1966 the Imperial Division had one design and the Chrysler Division had another for the spark plug wires were routed slightly different. Even though you clarified the 440 engine, each division was different in this manner. The smaller 383 and 361 of the Chrysler Division used the same spark plug routing as the Chrysler 440 engines. If you say ah I'll just use the Chrysler covers on the Imperial, then you will find out they are different lenght wires for the different Divisions in 1966. Only the covers of the Imperial Division had front and rear wire looms tack welded to the side of the valve covers. The 1964 to 1966 Imperials are all the same. Rodger & Gabby Colo Spgs '47 De Soto Custom w/Fluid Drive & passenger door mounted swamp cooler '62 Crown Coupe w/std A/C & Auto-Pilot '66 Le Baron w/dual A/C & reverbed AM/FM '70 Overlander - InterNational Dbl '70 W100 w/318, NP 4 Spd, 3:55 & Short Box '77 D150 w/360, NP 4 Spd, 12 Bolt Axle, OEM Buckets & etc ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm