"Races" are used with roller bearings. Inner race, outer race, the roller elements (balls, tapered rollers, non-tapered rollers) ride on the races.
Automotive crankshafts use plain bearings--no roller elements. Therefore, no races. Automotive cranks use a steel insert that's plated with various soft-metal linings--lead, aluminum, copper, tin. The soft metals ride directly on the iron or steel of the crankshaft. The steel backing of the bearing is held in place by getting clamped between the main cap and block, or between the rod cap and rod body.
Ring-ding engines often use roller bearings, lubed with the oil mixed into the fuel--and into the 1980s some four-stroke bikes had roller-bearing cranks. I'm sure a guy could research and find some examples of automotive four-strokes with roller bearings...but that'd be really unusual, and certainly not on Chevy/Ford/Chrysler/AMC.
"I" would not buy a used connecting rod/piston assembly from eBay. I'd go directly to a friendly Treasure Yard, and pick the rod/piston assembly directly from a suitable core engine. Choose wisely, and you wouldn't even need new rings or a bearing. (Both a ring set and a fresh bearing are recommended, but likely not essential.) You're looking for a relatively low-mileage engine that's clean inside but scrapped for some other problem--an issue with a different cylinder, perhaps.