Thermo-Quad metering rod measures
TQ with HIC. There is a hole of about 7/32" under the HIC, goes through to the carb base. When I am going to use a TQ on an engine with a big cam, I use that hole for bypass air. I make a plate that screws into the adjacent boss that I can swivel over the hole to vary the amount of air.
![DSCN0268[1].JPG](https://www.forabodiesonly.com/mopar/attachments/dscn0268-1-jpg.1716317893/ "DSCN0268[1].JPG")
TQ with HIC. There is a hole of about 7/32" under the HIC, goes through to the carb base. When I am going to use a TQ on an engine with a big cam, I use that hole for bypass air. I make a plate that screws into the adjacent boss that I can swivel over the hole to vary the amount of air.