Spark plug

[dodgedream]

I ma working on a new to me 440 coronet and I need some information. The car has a miss and I am working thru the simple issues first, I Am gonna go buy a set of plugs just to have them on hand and don’t know what I need to get.The engine is a bored out 440 with( I was told) flat top pistons and a purple shaft cam. The heads are cast original heads . Any suggestions on what plugs I need to get with this limited info? Thanks in advance

 

[radical rob]

First buy a factory service manual. Will be extremely helpful. With mostly stock setup any advance or AutoZone can tell you what to get.

 

[dodgedream]

Thanks for replying. I didn’t know what temp range or possibly different reach plug I might need since the engine had been modified

 

[dadsbee]

J11y's....

spark plug cross reference

 

[Fran Blacker]

Service manual can be downloaded but don't think it would be easy to use. APC lapiop or Ipad better. Service Manuals – MyMopar

 

[WileE]

Champion J11-y

 

[turbine68rt]

What condition are the plugs in that you are currently using? Are they consistent? some oil fouled? What type of ignition?

 

[dodgedream]

Thanks for everybodies replys. I haven’t gotten to the shop to pull the plugs yet so I cannot answer any condition questions but it is an electronic ignition. I am hoping to get to the car maybe sun or Mon and pull the plugs ( supposedly new ) but don’t know yet if they are even what needs to be in the car. The next couple of days will tell the tale

 

[Geoff 2]

NGKs, 5 heat range. If you want it to misfire, use plugs that are too cold...