it sounded fine when it was happy- probably use some lucas or some valve seals. was smoking a bit but we had the O2 unplugged also.
my old boss has a GMC 2500 with a 40k 6.0 in she drove from her dads but then it sad and as brake line issues now, she wants it off her lawn. truck is pretty NY'd out but said runs great. ill find out info on it.