Offenhauser head spark plug length

[justpassinthru]

I have seen a number of threads on this issue and it seems the popular plug choice is the NGK B6L plug. That plug has a 7/16" reach, which may be fine for stock heads. My Offy 8BA-425 heads measure 1/2" from the plug seat to the inside of the chamber, so wouldnt a spark plug with a 1/2" reach, such as the NGK B6HS be a better choice? Its still the same heat range, 14mm thread, non protuded tip, non resister as the NGK B6L.
Bill