im at school right now but i will get the date code when i get home i have the oil pan and heads off of the motor right now how can i tell if the cyl walls are 427 walls? i know the motor has already had a .60 overbore and a 428 crank i dont have crossbolts but im never really looked to see if there were any bosses for them what should i look for and also what would you value this motor at with the 3x2 and everything