Oh sadness! Surgery required.

I got my picture from http://chevy.oldcarmanualproject.com/booklets/52mts20/index.htm to show the adjusters for a quick reference.

Last edited by buoymaker; 12/22/2021 9:46 PM.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."