C-124 Globemaster
Bill:
Re the -7 and the Allison turboprops, probably just as well the engines weren't ready. Remember the early Electras and their tendency to disintegrate in cruise flight. Think that was traced to engine mountings, but don't remember. That killed the L-188 in commercial use. Had that happened to the -7 it probably would have been a commercial failure too. The Electra was developed into the successful Orion. Just as the deHavilland Comet, another commercial failure due to midair structural failure, later corrected, is still flying as the Nimrod.
Get a 3-view of the -7 and some pictures, maybe from Bob Banka, and bash the -6 plans. They're not that far apart.
Anybody's plans you can bash, screw up too bad it'll just crash.
Bill.