Yes on the Sunbursts.
Nope. All the street cars delivered in the fall of '65 came with the 7.5" Halibrand "Cobra II" wheels. The Sunburst wheels, which were designed by Peter Brock and manufactured by Kelsey-Hayes, weren't ready until very late in '65, hence only cars delivered after then came with them. They came about because they were less expensive for Shelby than the wheels he was buying from Halibrand.