I have a 327/400hp it has trick flow heads,HEI dist.,Edelbrock 1406/600cfm carb. I pulled the plugs out too look at them and found two of them to show grey color around the tip area looked like a lean burn. The engine has alway's felt like it is holding back is this a case of a small carb or something more.
I was asked about comp. it is the same 155 psi give or take a pound or two