Rebuidling new drive train in Vintage Peugeot

[liang]

Hi guys!

I have a Vintage 1975 Peugeot Mixte and am currently searching for some BB, crankset advice.

Assuming my BB is french-threaded, I asked around and most people suggested:

http://www.velo-orange.com/grcrufrthbob.html

Which I am most likely to buy. Now, I'm aware that I need to find a crankset first to set the spindle length, but I just can't seem to find the right one. I'm doing a 5-speed conversion, so a single chainring is desired. And since the Velo Orange BB above is square tapered, I would need a square tapered crankset.. I found this on eBay and was wondering if it was a good way to go?

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

I know it's three rings, but I'll ask the seller if they're removable and should I be fine? Another thing, as a Pyramid brand, what spindle length should I be aiming for?

Also, what can I expect from the number of teeth? (Sorry if that's a dumb question, I'm very new at this!)

Any help would be greatly appreciated!! Thanks!