View Full Version : Spark Plugs which type
ksamson
05-06-2014, 09:02 PM
Hello Roadsters, I have a 351W stroked to 393 cui. I have a MSD 6AL Box with a MSD blaster 3. I have a 750 cfm QF Carb. I am having problems fouling out plugs. I am running NGK plugs for a 351W. Any advice?
Bob Cowan
05-06-2014, 11:02 PM
It's hard to beat a standard Autolite copper plug. They're durable, inexpensive, and easy to come by. Start with a 3924.
Gordon Levy
05-06-2014, 11:34 PM
What heads?
CraigS
05-08-2014, 02:59 PM
My 351 has Edel performer RPM heads and somewhere along the line I wanted to replace the plugs. I bought the Autolite 3924s Bob mentioned and was almost scared to install them. IIRC they were $2 each. How good can they be when I am used to paying $6-10 per. Went ahead anyway and they have been great. No problems at all. I wouldn't expect them to last 100000 miles in a modern car but they are great in my FFR.