My 24 Flint uses Spark plug AC78RT. Anyone know what the RT stands for and can I use an AC78?? Does anyone know what is interchangeable with the AC78?
Need 6.

Yates

Where Are You From? Newport, NC

Do You own a car built by Durant? 24 Flint E55

R= resistor and T= tapered seat (area between the threads and the shell) Replacement would be Autolite 3076 or Champion W20

Where Are You From? Texarkana, TX

Do You own a car built by Durant? Several

Don,
Found and bought the Autolite 3076. Thanks for all your help.....

Yates

Where Are You From? Newport, NC

Do You own a car built by Durant? 24 Flint E55

if you want to go champion then you can use w89d plug. I have found that the 6 cyl star and my locomobile use w16y champion plug. it might be universal?

Where Are You From? bay area

Do You own a car built by Durant? 24 flint,27 loco