Tony. If you going to buy a crank Check the french crank against a merc crank.
A ford crank is 3 3/4" stroke. the Merc crank has a 4.0" stroke. The rods are the same, but each crank would need different pistons. It is the "piston height" that changes (measurement from gudgeon centre to top of piston changes) Rods are 7.0" centre to centre.
I dont know what spec the french crank is. the ford is 239 cu.in., while the merc is 255cu.in.
If you haven't found it yet, have a look at "Rumbleseat's flathead visions"
Lots of info there.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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