Looking for information on my car

I purchased my 67 mustang in 2020. The previous owner passed away and the relatives who sold the car had no info on the car. It is a lime gold coupe and black hardtop with engine and transmission modifications. He has a banner on the front windshield from DB Performance Engineering (I saw a few post on DB Performance Engineering in here). I am curious if anyone knows a member that goes by the handle of Hhead…. His car looks like it could be this car. Any help would be appreciated.
 

Attachments

  • 1F485C8A-9E88-42FD-B2DE-CE57B3C637B7.jpeg
    1F485C8A-9E88-42FD-B2DE-CE57B3C637B7.jpeg
    1.2 MB · Views: 40
  • 6CCB65BF-6DB8-49AD-B5BD-739D0A982902.jpeg
    6CCB65BF-6DB8-49AD-B5BD-739D0A982902.jpeg
    1 MB · Views: 38
  • 5CB5070E-9189-4ACB-A735-5520CF72EC3D.png
    5CB5070E-9189-4ACB-A735-5520CF72EC3D.png
    1.3 MB · Views: 26
  • Sponsors (?)


He was last seen on the forum Dec 15, 2013 so its been almost 10 years since the last post. Does the car have a T56? If so it looks like he was a more frequent poster over on https://www.vintage-mustang.com/ as the last time he was seen there was May 29, 2016. You may want to see if anyone knows much about his car there as well. I have a login there which is why I checked.