Cajun, I know this is an older thread, did you find what your looking for?
A word on Art Morrison, you can call them up and get anything made. They have just about every car dimension in autocad and use this along with your input as the base on how to make the frame.(prostreet, protouring, whatever) I know they are building a 53 Stude now for Craigs wife, and the new catalog shows a frame for around $7500. Maybe you can hold off on building the third shop and go that route
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I had AM build a front clip for a 68 International, they also built a couple of teardrop trailer frames for us, (independent trailing arms, dropped floor, air ride) very good people to deal with.
I look forward to seeing your build
Dan