Which plugs to use?
As the title says I am wondering what plugs I need for the new engine.
This does sound like a stupid question, but I will give the reasons.
The new engine going in my 1990 is from a 1988 Toronado,
In the Haynes manual for 1988 only it calls for the R44LTS6(41-936 for platinum),
my 1990 calls for R45LTS6 ( 41-902 for the platinum)
and I am doing the ignition upgrade to the 97+ SC coils which call for 41-101( platinum only).
All these numbers ore for AC Delco plugs, since that is what I use
Right now I just installed the R45LTS6 ( what is supposed to be in the 90), but do plan on going back to platinum (41-902) as before the engine blew.
So should I be using what the engine calls for, what I used previously, or what the ignition calls for ( for the new coils).
It'* always the simple questions that are the toughest, LOL.
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