I've reuse many stock pushrods on rebuilds with new cams, both solid and hydraulic liftes with no issue on any brand of cams
i have seen some wear on the tips running against the fuel pump levers but nothing alarming
I have 5 or 6 stock used ones in the shop that I could use in the future but I now recommend to my customers to upgrade their fuel systems to good high volume electric pump and dump the stock mechanical types