Hi all ... I was wondering if anyone has any advice on the correct spark plug type (heat rating etc.) for my set up. I run on 98 octane pump gas with 9.5:1 compression. The plugs I am using at present are Bosch FR8D+ and they always seem very pale and white even every time I remove them, The car seems to run OK though. When I bought the Edelbrock Performer RPM heads, they came with no mention of which plug types to use.