I'm finishing up the build on my 306 and I'm picking up the entire edelbrock performer package - the smog legal one. I was going to order ford racing valve covers, and pick up the tall ones. Running roller rockers. In addition to this, if I use the tall valve covers, do I need the manifold spacer? Edelbrock has a manifold spacer kit that's .5 inch thick, but it also claims cooler charge and more power?
Guess I'll pick up the tall valve covers and see what happens. Thanks for your input so far. Anybody else?