Engine and Spark Plug Question

57Fireflite Posted 2021-07-26 11:23 PM (#613820) Subject: Engine and Spark Plug Question Regular Posts: 59 My engine has the stamp, S24-T244T -- I think this is from a '56 Fireflite. Can someone confirm/correct? Also, I just pulled an AC-Delco R43S out of it -- I was going to replace with same but thought I'd ask if there are recommendations for an alternate plug? Thanks, Jimbo Powerflite Posted 2021-07-27 12:48 AM (#613822 - in reply to #613820) Subject: Re: Engine and Spark Plug Question Expert 5K+ Posts: 9681 Location: So. Cal S24 is indeed the proper stamping for a '56 Fireflite or Adventurer. I'm not sure about the "T" stamp though. There is high probability that it is supposed to be "1" instead. If you would like to get options for different spark plugs, take a look at what Rockauto or other places offer for the engine. 57Fireflite Posted 2021-07-28 12:35 AM (#613840 - in reply to #613822) Subject: Re: Engine and Spark Plug Question Regular Posts: 59 Thanks very much, Powerflite. Much appreciated.