Check out the scalloped roof section on an 81 Eagle wagon. It would work very nicely in that chopped Conestoga top. I had to shorten it up some for my 2 dr. ht, but it blends with the car very well.

Dean

By the way, if ya do go chevy power with it, Belmont Rods has a front motor plate that bolts the chevy right into the stock stude mounts. Here is a pic of my 54 Starlight Cpe. Stock running gear, dropped a 350 chevy in it.