This might be the final nail in the coffin! After a few more title info request to the PA DMV, they have replied that the first owner info is unavailable due to a system error. A few phone calls netted nothing except a dazed response that some records were lost. So, it appears that I've exhausted the DMV's, and am now chasing people leads - apparently Bill Miller of Carlisle Events worked at Sunderland for several years.
I'm going with Sunderland Chevrolet as the original dealer. There is a Sunderland Chevrolet in Jerseyville, IL, and I stopped by on my way to SCR8 to pick up some dealer decals - just have to cut off the Jerseyville portion
Now, If I could just find those original seats - so I could pull out that broadcast sheet
Added pic!