Brent,
At the risk of seeming to use a sledgehammer to get your attention, Tom Kirkham gave you some pretty specific reading above which you haven't addressed here - did you check it?
Just in case, here's the reference:
Quote:
Run-on (too lean or too rich at idle):
Lower idle speed and/or richen the mixture by
turning the idle-mixture screws outward by a quarter
of a turn. Double-check ignition timing.
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This might work.
Run-on is a carburetor and/or ignition problem,
not a 460 problem
Let us know,
Tom