Tanner T-5, around 1970 when it temporarily became a street machine. After Dr. O'Keefe's ownership, Faisal Meerzo made a roof for the car.
Meerzo autocrossed the machine a few times before moving to Florida, selling it to yet another fellow from Saginaw.
The roof is long-lost. Probably for the best, you'd have to have been a gymnast to get over to the driver side.