Plugs

**olredalert** · #1 02-22-2009, 08:36 PM

-----What would an R43S AC sparkplug be correct for??? Does the "S" denote short??? Would this plug work in a correct 69 Z engine??? Thanks.........Bill S

**Salvatore** · #2 02-22-2009, 08:47 PM

Correct plug for a 69 Z. To cold IMO. S=extended tip.

Chevy454 · #3 02-22-2009, 09:04 PM

This link has some more info as well: click

**Mr70** · #4 02-23-2009, 01:08 AM

Bill
Various engine equipped 1967-68-69 Chrysler Imperials,..Dodge Dart-Coronet-Charger & Dodge Trucks,..Plymouth Barracuda,...Oldsmobiles Cutlass F-85,all came w/AC R43S=Extended tip spark plugs originally from the factory.
Even International Harvester Trucks throughout 1973-1976.
Their detailed engine lists are too extensive to post here.

**olredalert** · #5 02-23-2009, 05:36 PM

------Thanks to all!!! Apparently usable but not optimum???........Bill S

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.