Use a compression fit Mavic BB. Good enough for winning classics, and the Tour de France (stages and GC) back in the day. Any uber bike shop should have a set of Mavic BB chamfering tools collecting dust in the closet. After chamfering your shell, the Mavic BB fits via compression.

The BB doesn't care what the shell "was" (french, english, italian).

You'll get a silky smooth BB, and an epic BB.

A Mavic BB is a useful component to use on vintage frames with destroyed BB shells, or with french BBs. Keep it in your idea toolbox.