Did some research into "D" wheels Tony has a nice set of wheels and a good price for originals. "quote"
The original Torq-Thrust "D" was released around 1965, and was configured to provide disc brake caliper clearance on then-current Corvettes. The hub of the wheel was moved outward a half-inch, and the spokes curved inward at the ends.
The original aluminum Torq-Thrust "D" was only produced in 15 by 6 and 15 by 7.
I will post link in lounge for reading pleasure will probably sum up alot of questions on vintage wheels. Good luck with the sale Tony