I haven't done anything, engine wise, on the A but I have been picking away at the frame design and getting the body modeled in UG.
This is where I am at right now. Body is about 50% complete and I have a frame design bubbled up to look at proportions. I stretched the rear wheel base about 18" and have a couple of ideas for the back to cover the tires.

I am contemplating an underslung chassis design with a full cage. Using 1 5/8 OD DOM and building it to fit inside the body lines.

A top view of the chassis shows the shape will mimick the body lines.

This is just looking on my part, any input? Thoughts? I will probably do a typical 4bar in the back, possibly cantilevering the coil-overs horizontally, cross-car. The front will probably be a single transverse leaf spring with a 4 bar also.
Mark