Your Intrepid Reporter sees that the idea that Lovelady was 5'8" comes from an FBI report where his height is stated based on "interrogation and observations."
However, Lovelady told a NY reporter in 1964 that he was some 3" shorter than Oswald, which would make him 5'6".
"Mr. Lovelady said the F.B.I. had taken pictures of him from various angles and that he had been shown a three-by-four-foot blowup of the doorway picture and asked if he was in it. ‘I immediately pointed to myself in the doorway,’ Mr. Lovelady said. He said he was about 15 to 20 pounds heavier than Oswald and about three inches shorter. Asked whether there was any resemblance to Oswald, he replied, ‘I’m fatter in the face.' 'It was me in the doorway,’ he said. ‘If anyone doesn’t believe it, they will just have to take my word.’ (5-24-64 article by Dom Bonafede in The New York Herald-Tribune)."
Whatever. What can anyone do but laugh at this stuff? It's all a Rorschach test. You're all pretending at some sort of certainty on the basis of what is almost entirely guesswork.