You need to do a compression test and leak down test. How low did you run the oil? Change the oil and look for metal flakes. You can use a magnet to find metal shavings in the oil.
i spun a bearing once... you possibly did too... does the noise come and go or is it constantly there... mine was not always noticeable... but either way you would need a bottom end rebuild at the minimum...
it was a very low tone knock...
do the valve seals in the head as well... take that one from me... i learned my lesson
and if you rebuild, may as well use forged parts. won't cost that much more in the end. wished I listened to everyone on that one, not that I have any real need for the parts, just sort of a could've had em for about the same price.
Yep most likely hurt the motor, do a compression test to make sure. Then most likely get ready to fork out some dough.
Like everyone said if you plan on doing any performance mods to it you might as well go forged, if its just a stock DD and you plan to keep it that way then just do stock rebuild or look for a wrecked GT to pull the motor out of.