I am having some problems with my wifes 69 fastback. It has a 302 with a 2 barrel carb. Before we got it it had been is storage for a Number of years. Now when I got it running and back together I have no power coming from the #3 and #7 cylinders. It Idles fine but under load I noticed it. I pulled the plug wires one at a time and found nothing happened when I pulled these 2. It sat for years with an open intake. But at least it was inside. Has anyone had a problem with a blocked intake port or should I do a compression test to look for stuck valves. There is plenty of spark getting to the cylinders and the plugs are new.