318 main Bearing thrust diameter

After buying and installing main and rod bearings, I've discovered that there are two different sizes for the thrust Bearing diameter.

Our engine is a 1983, which has the larger diameter Bearing. I got this set of king bearings,

King SI-Series Main Bearings MB558SI

Which they don't say, but I believe is the earlier smaller diameter.

It dosent appear that it makes a big difference, but I figured I'd ask.

Thanks. Eric