OIC, yanno I have a ECM with similar questionable tracks but passed all continuity checks. While installed in a vehicle it appeared to run fine on tuning days. Once released back on the road, it had random intermittent fits of misfires and bad hesitation then would run like normal. I've never verified that was the problem bc we upped the ante to a '427 PCM. I've always contemplated on repairing that ECM by soldering in another board from a donor ECM but why ruin a known working ECM. Soooo...I've always wanted to ask, Dynamic EFI <click> when a ECM is modified with EBL, that very circuit board is removed. I wonder if Dynamic EFI would have any of the boards laying around that he may be willing to sell.