I don't know. All I did was copied and pasted it. The only fear I have with going with the XE268 is valve guide clearance. Hughes racing says that anything over .450 lift might need to have the valve guide shortened. So the cam that I have now is under that far as the specs show. I will have to measure it to find out if I need to take the heads off. Outrageously Vintage is working with me on this. They told me to measure it but I have never done that.
