I have absolutely no idea how your boss came up with that manifold design, or how much it improves over a simple header system, but it looks awesome and somewhat intimidating. I bet it would be marketable if you guys chose to do that.
About the pics, take your time ~ especially in low light settings ~ use a bounce flash or a tripod if you can. Above all, concentrate on a handhold that gives you maximum stability. The cars aren't moving, so they'll be there if it takes you an extra 30 seconds, or two minutes to get the shot you want.
A little less caffiene, perhaps???? (shocked)(shocked)
I'm feeling the work you guys are doing. Looks good.