yeah. it happens. Good to see you are doing the oil pump at the same time. That was the issue with my 93 SSEi. The oil pump failed, pressure shot up, blew the filter off, dumped all the oil, and spun a bearing (all before I owned it. Bought it like that). I got lucky and found a 93 motor with 28k on it for $450 and dropped it in and drove it for 25k before selling the car. I did, however find a 94 SSEi motor with 65k on it for $250 and kept it for a spare, cause at the time I found it easier to just replace the motor if something internally went.
When you get everything changed over, make sure to do an oil change after running the engine for a short time to get and metal flakes from the spun bearing out. i would then change the oil at 500 miles, and then again 1000-1500 miles after that, just to be sure you got everything out.
2007 Saturn Aura XR | 1970 Chevy Blazer 4x4 | 1970 GMC 3/4 Suburban 4x4