there are alot of HW's that Chuck would tear apart but in theory it would be a good fight. Both are excellent standup fighters but Arlovski will have the natural advantage in regards to bodyweight and strength. Chuck would only need to get in 1 punch though, as Joe Rogan said hes got enough power to KO a horse
I think Arlovski would take it, he has better cardio. Chucks my favourite fighter but Andre is the man right now