Yeah, I'm not really sure what happened on that one lobe. It's not totally flat, just one small flat spot. The lifter was a bit rough, but didn't have a matching flat spot. Don't know how long it had been like that though. I spun a rod bearing, so could have happened around the same time due to reduced oiling.
This was supposed to be a quick and easy rebuild where I just fixed the crank and put new bearings in, but with 126,000 on the clock there were several other wear parts I decided to replace while I was in there, whether they really needed it or not. The two rods on the one journal that went were pretty toasty, so ended up with two new rod/piston assemblies since that was the easier way to buy them. Went ahead and got a new timing set and rings while in there as well. Later found the oil pump rotors were looking a little rough and then found the cam and lifter issue. Dropped the heads off to get them cleaned up and found out some of my guides were worn beyond spec. At this point though I've had everything all the way apart so I'm pretty sure I'm done finding new damage, or at least I hope so. Starting putting the short block back together while I wait for the rest of the new parts to show up. Hoping to have a car again by the end of the month if things go well.