54Y = 1954 with Powerglide (car engine)

Are you running Ethanol or Non-Ethanol gas?

https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/1140578/2.html

Reproduction (allowed by AC Delco) green ring AC-44 spark plugs are showing up at $60 to $80 for 8.
It says 43 on the box????

https://www.classicchevy.com/chevy-ac-delco-44-fire-ring-spark-plugs-reproduction-57-327003-1.html

Buy an owner's manual copy and write in it important info like engine year and size.
Keep it in your glovebox. I have problems remembering so this is what I do.

Last edited by buoymaker; 04/23/2022 2:04 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."