I hate to be a weenie about a What If creation, but wouldn't the CG be out of place in this configuration. Where's the engine? There are 2 alternatives:
- in front of the cockpit, in which case the really long jet pipe would run under or through the cockpit - I can't imagine that would be popular among pilots
- aft of the cockpit
In either case, a large mass has been unbolted from the front end and another added further aft while the wings and tail seem to retain their P-47 positions.