Originally Posted by
rhenning
That bottom bracket will not fit a Viscount frame it is to big in diameter without cutting away the frame tubes that go into the BB. You would not want to do that as there is then a much greater chance of breaking the frame. The only thing that fits Viscounts is the original BBs and bearings.
Not so. Trimming the tubes inside the BB shell does not compromise the strength of the fillet outside the BB shell. A Dremel with a stone cylinder fitted does a quick job of getting rid of the excess tube. Once that is accomplished a threadless cartridge can be fitted.
N.B. The shell on my Viscount is only 65mm wide. If the OP is using crank arms intended for a old style asymmetrical spindle, the 127mm length would probably be best.