If my not so reliable memory serves me correctly, they machined those to fit, 
as well.
( I know that wasn't your question. )
 
> From: John Caffrey <jdc6@lehigh.edu>
> 
> While reading back through articles on Project Midget in Classic 
> Motorsports, I see a picture of the B calipers they've just rebuilt. The 
> relief on the piston is shown 90 deg. away from where it would be 
> positioned on the Spridget caliper. I don't have a B workshop manual, 
> and would like to know if they made a mistake? I don't know why the 
> relief's position wouldn't be the same for the Spridget and the MGB.
> John
> Fogelsville, PA
 
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