Sounds like a neat find and story that will add to the interest and enjoyment of the car going forward. The O/D trans will help a lot with the "daily driver" use. If it were me I'd go with the rear leaf spring config rather than coil overs, primarily for the potential of additional weight in the rear seat when carrying passengers (four doors makes that a potentially more frequent occurrence). A second thing on the four bar rear, albeit not a biggie, triangulated configuration makes it a bit more challenging to route the exhaust cleanly.