51 Merc into 1940 fordor flywheel clutch questiond

[rotorwrench]

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The 49 through early 1951 all used the same 1 3/8" 10-spline as the early Ford. Sometime around February of 1951, the change to the 1-inch 10-spline started along with the big cast iron bell housing.

A person needs the pressed steel half bell of the earlier 1949-E51 Mercury cars. The 49-E51 Borg & Beck clutch can be used or a Ford flywheel can be re-drilled for a Long type clutch of either the 9-inch or 10-inch variety for earlt Fords with the 1 3/8" 10-spline.