Rechrome bumper tri city

From what I have read before, all reproduction bumpers for B'cuda have holes for bumperettes / bumper guards. If that's still the case you would need those parts or additional bolts at least to fill their extra holes.
My choice would be rechrome on the very nicest cores I could find.
In any case I would put as much time and effort as necessary in correcting the new bumper to bumper brace fit OFF THE CAR ! Reason being, the braces are the stronger metal. if those braces are bent ( common after 40+ years ) the bumper metal will conform to them. Cracks in chrome could result.