As is customary, Yoshikazu's detailed exploration of the crucifixion process skirts round the engineering challenges of erecting a giant cross with victim attached into a stable position using only primitive technology. I don't imagine Roman soldiers signed up for getting a hernia by doing this job! One of the mysteries of construction history to set alongside Stonehenge and the Pyramids (and the provision of gallows in Western Townships!).
You can easily find out about Yoshikazu's manga work on-line but I don't think there's much else of a gay flavour to find, tell me if I'm wrong!