Here is the definitive answer to that question - direct from Marty!
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Hi Glen:
I hope this settles the nonsense I've seen around this photo. Since I took the photo I know it's real.
He made just a couple of passes and I nailed the shot.
Somehow the shot on the Yenko website and what you have sent looks as though it may have been retouched.
I'm not sure if there was that much daylight under the wheels when I took it.
However, the wheels were up. It's the real deal. It was shot during actual dyno testing, not so I could get a shot pulling the wheels.
It was shot on a Saturday and the car was being readied for the track on Sunday.
Hope this helps,
Marty