I emailed the owner to get some clarification, this was his reply...
Dear Adam,
Thank you for your commentary. You are correct that a very small number of 475 hp Black Widow engines were made by Doug Rippie Motorsports. I failed to add the word "Type" to my description as it should have read 500 hp DRM Black Widow Type engine as it was sold to me by Rippie's shop as a 500 hp "Black" engine. They asked me what color paint for the lettering and I asked for Quasar Blue to match the car.
I'm not attempting to misdirect anyone, especially when one considers that I've invested almost $90K in this car and will probably sell it in the mid-$20's. Thanks for pointing out the inaccuracy, which I'll try to rectify.
Sincerely,
Andrew Kopperl
Well, this seems genuine enough, I'll retract the Shenanigans flag.