I am just finnishing puting a D14 engine in a B. The flywheel and 9" clutch will not fit, but Your B flywheel will bolt to the D14 engine. The B radiator mount will have to be drilled to 5/8" to fit the front of the D14 engine. The muffler hole will be about 1/2" moved to the left as the D14 manifold is wider. The oil cap is not going to lign up with the hole in the hood. The air filter will not work. The D15 fan is too big, use the B fan. Bill B
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