| Re: 500 with 425 heads
The power you get will depend on the cam you have in it as well as the comp ratio. I don't know the sizes of the 425 valves compared to the 500 & 472, which could also be a factor. If you have stock rocker arms, (1.65:1 ratio) it will have less power than the aftermarket 1.72 ratio arms. All these things have a direct effect on power output.
The advertised duration of your cam could help figure a ballpark idea of power. Something in the 280 degree area would give a fairly good power boost. |