Join Date: Jan 2004
Location: Winston Salem, NC
In your first sentence you said "no real problems" so I would leave it alone. I am a firm believer in the "if it ain't broke don't fix it" motto.
With todays fuels and additives the only way to read plugs is make an all out blast (preferably at the track, shut the motor off immediately and coast to a stop. Any idling time will alter the "read" on the plug.
69 Camaro, 3650lbs., 400ci, TH400, Coan 10" converter, 3.50 gear
D1SC, pump gas, 9:1, 10 PSI, Water/Meth injection
1.325 60', 5.988 @ 115.4 (carb)
Switched to Super Sniper EFI 2019