This is not my experience. I have a 5.9 from a B350 with power steering and no AC, and my belt works ok. But I have noticed my idler pulley is smaller than any others I have seen before. Maybe that's the difference.
Have a friend that swapped a 5.2 into his Wrangler and cut up the AC mount to make a non-AC one. He didn’t have issues either with the PS and the belt rubbing. Reason was, the Jeep’s use a high mount pump like the trucks, but with a different mount.
