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Hey guys, newbie here. I have a 23 T-Bucket with a blown small block 350 with dual 4 barrel carbs. In a matter of about 24 hours my idle rpm in park have gone up to 1500. When cold the idle is normal, after she’s warmed up rpms will stay at about 1500 rpm in park. I’ve checked for vacuum leaks but couldn’t find any. My knowledge is pretty limited. But if you have any ideas, let me know. What should I check next? I doubt it’s the carbs because they would have both went out of whack at the same time.

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