I'm not sure about the Darts, but I run Autolite 3926's in my alum GM Performance Oval ports...3924's are a bit cooler. I have 10.5:1 compression with a Comp's 280H (230 @ .50) in a 496. You might see what Dart recommends for starters,..but I've always been very pleased with Autolites.
what would be a good spark plug for a bb chevy that has 10.1 compression dart pro 1 heads cc cam solid lifter .580 lift 272 duration, i run this car mostly on the street thanks ray
I believe that DART recommends Autolite AR3924 for starters. But I prefer NGK plugs. You can get their specific recommendation here . I know they go into great detail to make sure you get the right plug. Be prepared to answer questions like what ignition system your running and other details.