During the on-going restoration of my MGA I have discovered a broken pinion gear in the rear axle. Anyone got a useable used MGA (or early MGB 'banjo' type) differential to sell? I am seeking a 4.3:1 unit. This will be used in a vintage race car - a 3.9:1 ration (as is most common in the MGB) will likely be too high a gear ratio. Eric Russell Mebane, NC