I know this is probably a re-occuring question. But...
I have acquired a Italvega Nuovo Sport Frame, I believe from very close to 1976. SN: 1541. French threaded.

I have not rebuilt a bike before, so it will be a big learning process.

I received the frame with bottom bracket intact, but very hard to move.
i have removed the BB to repack the bearings. My next project is getting cranks for it. Is there any way to put a cotterless bottom bracket in so i can use some cranks/chainring i have or does it have to remain cottered.
The cups seem to be in descent shape so if i could find nice working cranks, i am not opposed to keeping current BB.

i also want to keep the integrity of the bike if possible.

any thoughts or suggestions are appreciated

thanks
john