He still looks pot gutted to me, but who knows with the pic. I will say with the weight and his age you need to push him quite a bit harder, heck we have commercial calves with no creep that will wean at 7 months as 7 weights. If he has been up as long as he has and still only weighing that, he probably needs a good deworming and the feed poured to him. If I remember correctly he was on unlimited hay. Is this the case? If so, it still needs to change, because honestly I don't see alot of change on the gut, but I do think he has gotten a little more condition . Not trying to be critical, just want you to have the best chance possible at giving it a go with what you have.
A good haircut will help him out alot and will make him look a lot fresher.