Spark Plugs for 283 SS Motor
 

Asking for recommendations on spark plugs for a 283 SS Motor. Currently running autolite AR72.

Re: Spark Plugs for 283 SS Motor
 

NGK R5670-7 are what I've always used, but that was a while ago!:)

Re: Spark Plugs for 283 SS Motor
 

NGK isnt what it used to be Quality took a turn downard Autolite is a better choice

Re: Spark Plugs for 283 SS Motor
 

Yep, AR72

Re: Spark Plugs for 283 SS Motor
 

These engines have low compression ratios ,enormous camshafts , and probably oiling issues from the lowest tension rings and restricted induction systems !! Id go with AR75's as I've seen done !! Gotta go back to the 85b !! sorry if i hijacked your thread !!