Who can recommend a good spark plug for my 350. It has the 333882 cast number heads and it had Champion RV12C plugs in it when I got it. I don't know what the engine came out of but it has a mild cam, edelbrock RPM intake, headers, etc... The plugs look okay but I just want to make sure I get the proper ones. Thanks

I run AC Delco R45TS in my 400HP 350. Have not had a problem.