That was kind of you to post the header pics. It is virtually identical to my Hooker Comps as far as apparent height but if your engine is tipped then they would likely nestle in a bit higher. I am referencing the centerpoint of the primary into the collector.
In my case 2 primaries actually go forward from plumb and then curve back to the collector at 90* or less while all 4 of yours look to be converged higher, closer to the head. It was one of those two forward sweeping primaries my pitman arm hit in my '96 crash. You cannot turn the steering far enough to duplicate that much motion.
I can't comment on the pattern for lack of experience, but I think I have seen a pattern interpretation guide/tutorial on Strange's website. I'm not sure if that is where I saw it but that is all I can offer.
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