Quote: 68 440 forged crank. 440's did'nt start coming out with cast cranks till mid year 73.
While that could be true for production engines when new, thats it period. After that all bets are off until inspected. Block casting numbers and staming numbers dont mean $HIT. Face it these are 30 to 40 year old blocks. Someone has had their paws in most of them by now.
