Vintage Peugeot conversion help and tips please

Ahh right sweet, was thinking of getting some campagnolos ? theres a set on ebay for 55 quid atm. would they fit on this ?

and i bought this off someone in france ? not sure if that makes a difference to the bb ?
Velobase.com is your friend! In the example I've linked to, if you look in the section under the photos, on the left is "BB Length": this will tell you what length of spindle you need (hover over the "?" for an explanation).

If you're going to dabble in old Campag (the groupset name was added to parts from 1995) then you should become familiar with Velobase: lots of gear on eBay is not what the seller would have you believe it is...

As for whether being made in France affects the BB, you would know the answer to this if you had read what I linked to upthread.