The connecting rod bearings, rarley wear round, they get kind of egg shaped. The largest clearnace is the middle of the top bearing sleeve.
If the machined surfaces aren't scored (or have ridges), new bearings will probably work out for you. If they have ridges, chances are the whole works is gonna overheat and self destruct. The oil leaches/washes away some heat, the crank, heat sinks it's share also. The ridges get hot fast. In an ideal world, there is a constant film of oil betweeen the machined surface and the bearing sleeves.
Most times if you can see the bronze/brass bearing through the chrome alloy coating, it's sure enough an indicator they are pretty worn or will probably fail soon. You can spot check a few with plasti gauge. I usually check number three and five first.
I alway use plasti gauge to check my new bearings also. Nothing will cook them faster, than not having enough clearance. I'm not very trusting.
The bearings sometimes wear more on one edge of the machined surface than the other, a good caliper gauge/micrometer check may save some grief.
Sometimes a little luck helps.