Not Superformance. The under hood shot is a clear tell. See this SPO photo:
Yours (note the two 'bumps' on the firewall not evident on a Superformance):
Also, look at the dash in this photo - much different than yours (flat across the bottom):
Yours (dropped in the middle, steering column is higher on dash):
Here's where to find Superformance chassis number:
https://www.secondstrike.com/Registr...ions_MkIII.pdf
Superformance would never use a '65 Mustang VIN - that's unlawful in most places, BTW.