I want to put a triple on my Peugeot OU10.

I pretty well set on using a Stronglight crank,
because I want to keep the vintage look.

I've settled it down to two choices,
keep my Stronglight 104 122mm bcd,
and put on jonwvara's 122mm tripizler.
122 BCD Triplizers - Red Clover Components.

http://www.bikeforums.net/classic-vi...omponents.html

I like the idea of keeping my old crank.

Or replacing my 104 with a Stronglight 99 86mm bcd.
The 86 mm bcd has more options for swapping gear ratios around.

My real question is "Will they fit?"

Will they swap over cleanly, or will I have to get a longer spindle?
If I do, is it something easy to find?

I have a Swiss threaded BB, that I really don't want to replace.
(The cost of a new bb, could double the cost of the project)

My LBS tech, is wisely noncommittal, saying he can't give me an
answer without holding the parts in his hand.

Has anyone here done this?