what's the diff

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...morning all,

 here are some prices and spec's for 9inch diffs near Melbourne if any one is interested,,,,

Here are some aprox measurements
1959 Ford 9' - Ford car bolt pattern (same as XF) width face to face where
the wheels bolt on: 55 inches, 28 spline axles, 3:89 ratio - $950
1964 Tbird 9" - Ford Car bolt pattern - 61 inches wide, 28 spline axles,
3;10 ratio $700
1976 F100 - Ford Pickup bolt pattern - 64 inches wide, 31 spline axles, 3:50
ratio $750