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    1988 350 TBI Uneven Idle?

    Picked up a 1988 K3500 last year with what I believe to be a TBI 350. Runs great and has under 100k kilometres on it, but at idle it bogs down to a near stall before returning to normal idle speed. Any ideas on what's wrong? (It's got an SM-465 in it if that helps)
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