I used a 1980 Camaro w/ 305 on the Delco site and it cam up as R45TS, so that's what I got. It seems to be running much better but I only took it around the block. Delco also says R44TS for the Monte SS. I wonder why that would use a colder plug. My old plugs had lots of carbon on them so I figured the hotter of the two would be better for me.
Next it's cap & rotor time. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, July 28, 2006 3:24 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] spark plugs My Guess would be to get plugs for a mid year1980's Chevrolet Monte Carlo SS and/or Luxery Sport. Compare those to any trucks of the same model year with to get a heat range to your liking. http://www.sparkplugs.com/results_app.asp?productTypeID=1&AAIA=1419904 ( 1985 Monte CarloSS) AC Delco Standard plug---R44TS--> came straight from the Auto Zone page using a 1985 Monte Carlo SS 305 HP as my vehicle.
