1981 Corvette....I'm starting to pick up a little sound at times on the left front when going down the highway, sounds like a bearing spinning so figure bearing is getting ready to break down. Sounds mostly when going straight, when in a curve or slight turning sound is gone. Sound is minor as of now but do figure it to get worst if bearing is failing.

I would do both inner n outer while it was apart. Also a new grease seal as well. Rodney

I believe when you get the bearings it will be bearing and race together, ck your disk pads also. jacking up the wheel and rotating it should help to narrow it down

Get the tire off the ground so you can spin it. Spin it and check for noise, check for play top-to -bottom (this will give the bearing clearance), check side to side play (like you are trying to turn the wheel, this will give you a little bearing play, but also if you have a tie rod problem). while its up in the air, see if you can lift straight up with the tire/wheel with a bar, this way you can check for ball joint problems.

the recomended way to tighten wheel bearings is use a torque wrench, as you spin the wheel tighten the nut to 12 ft. lbs, back off the nut one lug on the nut, if the hole in spindle doesn't line up for the carter key keep backing off the nut just enough to get the key in, some spindles have two key holes which makes it easier

   Well jacked front off ground and checked movement in wheels, both left and right and did not notice any movement of any amount top tot bottom or in or out side to side. Did another road test, about 15 miles and only heard a slight sound once and it was minor but also was rather windy so made it harded to listen while driving with window down. May take it down and repack bearings anyway, can't hurt and check race while in there and then make decision to replace or not.   Will monitor and report later. Thanks to all for commenting so far.

I agree -  inspecting/repacking is cheap insurance...

probabley $25 a side

When replacing any bearing always replace the race too. The rollers in the bearings wear into the race and when only replacing the bearing there will not be a match between bearing and race and cause premature wear of the bearing.