Alternator whine, Ham radio!

[Gary - K7GLD]

My truck has always displayed an alternator whine of about S-5 on several different radios used casually for mobile operation. But I have now permanently installed a new Icom 706 MKIIG and Hamstick monoband antennas - primarily 40/20 meters. I really need to reduce or eliminate the level of whine I am getting from the alternator - it goes away if I disconnect the antenna, so appears to be radiated intereference rather than conducted thru the power leads. Power leads are large in size, and go directly to the battery, the rig is well grounded at the radio and antenna mounts in the bed. The whine is directly related to engine speed regardless of whether the truck is in motion or not - and noise goes away completely when engine is turned off. Everyone in this group should already know the engine is purely MECHANICAL, no 'puters other than ABS - and fuel delivery is all mechanical. I'm certain my problem is RADIATED noise, and need specific advice on what bypass capacitors or filters work best, where they can be bought, and as much Dodge-specific installation info as possible on what NOT to do that might cause charging system damage.

Any help?