Originally Posted by Doc Fiberglass
Hay guyz .... if you close-up the secondary door ... it WILL richen the mixture up.

Y iagreeES

You can get secondary jets here; https://www.carbsonly.com/
When i talked to him he only had .134, .137 and .143 but you could drill them out to a larger size if needed. The opening of the air door on the secondary's has a huge impact on mixture

1970 Challenger T/A 4 speed