For many, many mainstream Protestants and Catholics, certainly evangelical Protestants, you have a notion that you need the resurrected body in the way that it’s described in Luke and John. That was not Paul’s belief. Paul did not have a belief in the physical resurrection of Jesus. And I tend to agree with Paul. But it remains something of a mystery.
As for what he said about the Shroud of Turin:
However this image was formed, it was formed in a way that’s compatible with the ancient practice of Crucifixion.