The performance is in the pump.
I'd go thru it before dropping that mill in there, make sure its tight, right impeller, etc.
that combo should be close, depending on weight of your hull.
Mine goes 53-58, depending on weight in the boat, 454/berk
that wj may have an 'A' imp, but most likely a 'B' impeller.
Put a new wear ring in and shim it to spec
Daniel
