Hi Mike,
Thinking out loud about your 412 sq. in. per wing vs. total question? If your wing halves were arranged one right side up, the other upside down, to form a rectangle of sorts, that might let you ball park your total wing area pretty easily?
Been a long time since I've seen one of these, but that 34" wing span spec. sounds like a pretty small plane. I remember them as being much bigger. Could be I'm just not around many jets to have good perspective too. -Al