Larry The late '63 or 64 and newer heads have six attachment points for the leaking valve covers that will still leak or seep any ole way ( but not as much or often ). The valve covers used through the 66 model year Imperial will hold the spark plug wires out as your present assembly. Starting in 1967 the Imperial wires were routed different. You did not mention anything about the cam. If you change the cam bearings, then you are going to change the cam. The best cam for your heavy car is the RV/ torque cam offered by MoPar Performance ( # P4286675 260/260 @ .430 lift ). Other cams may seem tempting but the best bang for the buck is above due to your weight. The intake manifold was designed for torque also. Don't make the mistake of paying for a newer intake manifold for the carb has a differant bolt pattern and neck size. You will be trying to re-do the linkage and looking for a air cleaner housing that is large enough for the carb neck. The one thing that you can do is to switch the exh manifolds for the late model big block trucks on the drivers side ( they are center dump as your car is now ) and the matching in design that came on the last years of any MoPar big block regular 400 or 440. If you do this you will not be able to use the gen and then you must go to the alt if yours is a real early issue. 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 '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