# Junk Holley carb, or the 2 screws in the metering block.

**URL:** <https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594>\
**Category:** Classifieds\
**Created:** [June 15, 2010, 9:45pm UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594 "2010-06-15T21:45:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\
**Post date:** [June 15, 2010, 9:45pm UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594/1 "2010-06-15T21:45:08Z")

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I have been toying with my 67, and after re jetting it back down for pump gas and not the leaded 112 my uncle was running in it I noticed the 2 screws on the side of the rear metering block are missing.:bigtdown: No wonder my plugs look like they seen a ghost.

EDIT: I should mention I’m looking for the air / fuel screws

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**Author:** ![Pauly](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pauly/32/7493_2.png) [@Pauly](https://forums.speedlife.net/u/Pauly)\
**Post date:** [June 16, 2010, 1:51am UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594/2 "2010-06-16T01:51:38Z")

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you sure the block is drilled for screws?

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**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\
**Post date:** [June 16, 2010, 4:12am UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594/3 "2010-06-16T04:12:22Z")

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I’m pretty sure, maybe I’ll pull one off the front and make sure it screws into the rear. Who knows with this carb. Its had some wrok done to it

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**Author:** ![Pauly](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pauly/32/7493_2.png) [@Pauly](https://forums.speedlife.net/u/Pauly)\
**Post date:** [June 16, 2010, 5:03am UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594/4 "2010-06-16T05:03:26Z")

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some 4150 type carbs came with 4 corner idle and some did not. Pull the metering block off and look real close, i have a big old box of old holley parts, so i prolly have some screws

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**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\
**Post date:** [June 16, 2010, 9:44am UTC](https://forums.speedlife.net/t/junk-holley-carb-or-the-2-screws-in-the-metering-block/156594/5 "2010-06-16T09:44:18Z")

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its a 4150 4777-4 I’ll see if I can pull up a PFD or something. Thanks pauly