Hankins will never go for the 500 lb conventional deadlift with no straps. It's too real for him. He'd fail and have to face up to being delusional for the first time in his life and he doesn't have the pain tolerance for that. With the fights he can squirm out and say "bad ref call" or some such bullshit. There's no bullshitting the deadlift.
I think Hanky could "conventional deadlift no straps" 385 for sure. 405 would be dodgy and he might well injure himself and still say he "could have" done 500. 450 is not probable, and 500 is impossible for Hanky to do this week. Or ever.