Spark plug ??

[Chief123]

1986 4.3 2bl carb , point system. Putting in a new long block. The one old manual I have shows a AC-MR3T as the right plug. Is that still the best to use or you have suggestion what I should get.
Thanks

 

[robert graham]

Why would it be different?....

 

[Bondo]

1986 4.3 2bl carb , point system. Putting in a new long block. The one old manual I have shows a AC-MR3T as the right plug. Is that still the best to use or you have suggestion what I should get.
Thanks

Ayuh,..... It's what I run in My 4.3l motor,.....

 

[MRS]

I have 1986 4.3 same as yours AC-MR43T is all I use great plugs.