My flash player wouldn't let me see your photos at first. That is a wonderful build. Great color choice. In many ways it's such a modern build but the GMC and overall detail is so traditional. Great job no wonder it brings home the trophies.
I see your carbs have the adjustable main jets. On another site I was told by a respected carb expert that those are great in a single application but cause tuning issues in multiple setups. Have you noticed this? I used them in pairs and had no problems. Do you remember the venturi size in your carbs?