Hi all, im new here and new to the 385 ford family im mostly an fe guy but my son wants to put a 429/460 in his mustang were building and would like in the range of 600+ lbs of torque for this will be raced but also i might add were on a budget so my questions are 1. how do you tell the years of these 2.ive heard that some of these are internally balanced and others arent 3. what kind of cars can the ones you recommend be found in and year of car thanks fordbeast.