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Click on image for the lowdown. 
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| | | Forums66 Topics128,014 Posts1,055,328 Members48,419 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Sep 2005 Posts: 1,028 'Bolter | | 'Bolter Joined: Sep 2005 Posts: 1,028 | Usually the insulator is about 3/4 inch thick and protects the carb form over heating causing vapor lock and other issues
You might not have an issue in the cooler temps but it will vapor lock and gag a lot in the hot weather especially if you idle a lot ...like in a parade
Now back to my question. Heat hole should be exposed and does the insulator need to be notched?
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