Rocker arm combo ratio

While building a 511 i ordered the cam spec'd to my combo before i ordered the rockers. I ordered HS for victor head. It was suggested a 1.6/1.5 combo to be best. Well the cam has .403 int .410 ex lobe lift giving me .644/.615 valve lift before lash. Would there be any performance gain adding a 1.6 ratio on ex side to get a .656 lift?