50Deep said:SO is this the test mule spotted in dearborn that everyone thought would be the 2018 GT350?
Negative--the SEMA car was built in the two weeks leading up to the show by KohR Motorsports, and the customer "production" cars will be built by Multimatic (similar to the BOSS 302R). Ford isn't obliged to do any testing that would require driving these on the street.
Here are some photos of a 5.0L version that KohR tested earlier this year. At this point it is unclear whether this was the basis for the car or KohR's in-house effort for an S550 PWC car (prior to the possibility of privateer cars getting axed by the GT4 "factory homologation" requirement).