I have a Motobecane that came with a Stronglight competition BB; 118mm ISO taper spindle. I love the looks of the Stronglight 49D crank, but alas old age has crept up on me, and TA rings are just too darned pricey.
Soooo; for the past 3 years or so I have been running a Sakae SA crank, using it as a compact double, 48, 34 chainrings. The crank is JIS tapered but has seemed to work OK; I do occasionally have to tighten the non drive side crank bolts. I am thinking about getting one of the Velo Orange French threaded cartridge BB's and get the crank back on a Jis taper spindle. I still have the original spindle from the SA. It is stamped 3S; a quick visit to Sheldon Browns, vault o knowledge tells me it is 121.5mm long. This may be a rhetorical question, but I assume I will be OK to get the 122mm spindle option from VO, but wanted to throw this out to you all, see what you think.