Re: spark plugs all motor
 

I'd do 6's maybe...7's are too cold.

Re: spark plugs all motor
 

thanks for the replies.. anyone elese on here have some experience/suggestions.

Re: spark plugs all motor
 

R5671A 6 thru 10 heat range.

Re: spark plugs all motor
 

There isn't a single person in this world that can tell you the perfect plug on the internet. Start cold and get hotter check them often.

Randy
PS I would start with the 6's like chirs said

Re: spark plugs all motor
 

ACDelco FR1LS 8)

Re: spark plugs all motor
 

---- Delco cheap ----........

Re: spark plugs all motor
 

Wilford Brimley, is that you???