Scotty my buddy is looking to buy a 90s corvette 6 speed v8 any known issues that you know of or anything he should be aware of

that old, who knows how it was taken car of? SO, look at it, road test it, then have a guy like me, a pro, check it out to make sure it's in good shape. nothing particular goes bad by itself on them other than guys driving the crap out of them and wearing internals out.