[cougar67]

They look as same in picture, but are they? There is difference eg. in price.

 

[Beoweolf]

No, especially the later model 5.0 HO. As a reminder, the later model 5.0 HO, which have serpentine belts, are reverse rotation...due to the way the belt travels over the pulley. Water flow is the same, it just adjust how the impeller turns.