Great idea. Some thoughts on the rear window and the bulkhead below it. The rear window could be made into a wrap around rear window only a little more wrap around than say a mid '50's Chevrolet pickup. The bulkhead underneath would be hand formed. Another idea might be to raid an old AMT '55 Nomad kit since it has the roof, rear window and bulkhead as a build option and those parts might be made to fit here.