I am preparing to start tuning my LT1 not that I have repaired all the under hood systems and have been looking to pick up replacement flash IC's as backups. I have the 2 pulled from my original PCM but it corrupted itself while driving so I don't completely trust them. I have found a number of AN28F512-120 and -150 chips but none that are marked exactly like what I pulled. Are these acceptable replacement chips or will the cause a catastrophic failure if I use them? I am being a bit extra cautious as the last time I tried flashing these pcm's I bricked 2. Since then I have replaced the harness that I believe to be the cause, all the data wires where either hacked together from a rodent infestation with the last owner or corroded badly.