I always felt that the design of a girdle on an SB wouldn't do much since it can't tie in the same way a BB one does...but after reading this thread and seeing how it has helped or prevented cap walk in a few applications, it has got me thinking.

I have stock 2 bolt caps, stock bolts and a half fill in my block. I shift my 408 at 6700 and cross the traps at 7k on spray..wonder if this would be a good idea for the motor when I eventually tear it down for a refresh (hopefully still in one piece when I do).