1987 salon 307 spark plugs

[Chenz62]

just pulled a 41-630 from my 87 salon 307.
are R46sz interchangeable??

 

[69hurstolds]

Nope. R46Z is for 5A heads and earlier.

7A heads are different. You will need equivalent to ACDelco FR3LS6.

 

[Chenz62]

Nope. R46Z is for 5A heads and earlier.

7A heads are different. You will need equivalent to ACDelco FR3LS6.

Thanks! Found out 2 hours ago. cancelled order, ordering correct plugs. my 70’s-80’s mechanical experience very rusty!!! Wish olds wouldve kept thisd 5A heads through 87-88 classic

 

[MrSony]

Iirc ignore the gap spec of .080 if that's what it calls for. Go .060 or .045.

 

[Chenz62]

Iirc ignore the gap spec of .080 if that's what it calls for. Go .060 or .045.

Excellent advice! Read on other threads as well..