Have read through your build thread. Impressive, and very quick work. Hope my '67 FB ever turns out half as nice.
You mentioned you are considering chopping the top. I've searched all over the web this morning, but to no avail. When Rad Rides by Troy built George Poteet's '69 Cuda "Blowfish" several years ago, they performed what was probably the simplest top chop I've ever seen. They used to have almost 200 build pictures up, but no more.
They sliced the top of the quarter panels, front to rear, right where the face of the sail panel transits from "vertical" to "horizontal". The "A" pillars had a section removed, probably 1-1/2" or so, and then the upper and lower ends were pie-cut to allow for the change of angle of the pillar. Then the entire roof assembly was allowed to simply sink down into the quarters, basically using the dutchmans panel as a hinge point. After that, the slice was closed back up by pushing the sail panel skin back out to the edge of the slice in the quarter panel and welding it up.
I hope my description makes sense.
Mike in FL