Agree with ^ re getting a cartridge bottom bracket - cottered stuff is not good to work with.
I've known some people who had trouble keeping the threadless bbs tight, and they ended up creaking a lot. You therefore might wanna think about picking up a threaded one for your thread directions without much trouble (as I have done). Just make sure your axle length is right. Should be around 108mm, but best to check with Sheldon Brown or other lfgss'ers who've had more experience with single speed options (plus it can differ depending on the new cranks you procure).
Agree with ^ re getting a cartridge bottom bracket - cottered stuff is not good to work with.
I've known some people who had trouble keeping the threadless bbs tight, and they ended up creaking a lot. You therefore might wanna think about picking up a threaded one for your thread directions without much trouble (as I have done). Just make sure your axle length is right. Should be around 108mm, but best to check with Sheldon Brown or other lfgss'ers who've had more experience with single speed options (plus it can differ depending on the new cranks you procure).