Mel's challenge...
Well, despite a lengthy search, I cannot find the same picture, but after going back over the posts re the Dryden mislabeling of the same cockpit to both D-558 aircraft, I'm convinced that this challenge is the D-558-2 Skyrocket.
The main instrument panel is very similar to the panel identified as the D-558-1, with the addition of a subpanel outboard beside the left side rudder pedal tunnel. The yoke is the same as the D-558-1 yoke which did not show in the original post but was visible in post 984. The subpanel and added toggle switch on the left horn of the yoke are typical of the continual mods found on experimental aircraft. Further, this panel protrudes up above the cowling line (as you pointed out, Mel) unlike the flush-mounted D-558-1 panel in post 984.
Hence, it must be the D-558-2 Skyrocket.
Sorry to beat this to death, but in light of the earlier confusion....
Btw, if this is correct, make it open house. I've had several goes recently and am happy to share it around.
Glenn