Thanks for all thr info on cottered cranks. I work on more of these than I want to. I am tempted to buy a cotter press if they were affordable . luckily the Bike Exchange has one I can use.
Here are a couple pictures of the bike I wanted to put the Stronglight crank on, an early 70's ? Gitane Inter club . Gotta love that purple paint. I was going to put yellow bar tape on it but the cheap tape we had broke when I was wrapping the bars. I am not sure what the proper way is to wrap bars without hoods.
So here are the pictures. For its age the bike was in very good condition. The decals were almost completely intact. I only changed the front and rear derailleurs for something a bit more durable. I also swapped out the sew up rims for clinchers and gave it bar end shifters. We have a ton of them at the shop and I think they are easier and safer to use than down tube units. no looking down every time you shift.