Thank you all for chiming in.
New discoveries:
I used a length of heater hose held to my ear to try to pinpoint the whistle/shreik and discovered it is loudest just above the center siamesed intake port. Real screaming Mimi.
I tried the old pull the spark plug wire off at idle trick to see if the rpm's decreased and the 2 center plugs had NO EFFECT at all. (I did get the P shocked out of me though)1,2,5,6 had an rpm drop.
Then:
compression test shows 130psi - 135psi cold and dry cyl 1 thru 6
Compression test shows 160psi - 165 psi with 2 squirts of 10-30 in each spark plug hole cyl 1 thru 6.
I used 5 rotations of the engine each test. The gage quit climbing on rotation 4.
So the compression is good as I see it.
Ohm test of the used autolite plug wires shows about 3K Ohms per foot. The Bosch platinums have about 2000 miles on them.
I'm thinking vacuum leak at the center siamesed port.
Please weigh in with any thoughts. I welcome the input. I been messing with these contraptions since 1968 but I will never be too old to learn something no matter how common or weird.
