I use the Indy EZ heads on my 493. They were worked a little and flow 330 @ .600. I wanted to stay with the stock rocker arm geometry and stock exh port location which the EZ head does. The Victor uses offset rockers and raised exh port so I believe it has more potential then the EZ heads for a strong build. I have never used the Indy Victor heads but I hear they are a good head. As for me I like how good the EZ heads are and can keep all the stock dimensions. Ron