I dyno tested two different dimpled carb spacers from polymer racing products.
Link to purchased having dyno number text to you.
https://weingartnerracing.braveshop.com/#!/Text-Copy-of-Dyno-SBC-With-Dimpled-Spacer/p/669947287/category=0
Link to preorder book with all dyno tests from last session
https://weingartnerracing.braveshop.com/#!/SBC-Dyno-Session-8-5-29-2024-Print-Book-Preorder/p/669950810/category=0