The date of death on Raylan's mother's gravestone is the year 2000. However, it was often stated that she died when he was a boy, after which his Aunt Helen stepped in to help raise him and provide a mother figure. Raylan would have been 30 in 2000.
When the thug is holding his gun to Wynona's head, the hammer on the gun is alternately cocked/uncocked between shots.
The body Boyd dug up to take the place of Delroy would have been useless if it was already embalmed. This would have been a dead giveaway. However, since it was in a cheap cardboard coffin in a pauper's grave, it may not have been embalmed.