Thread: Spun rod bearing in my engine, Series III is cheaper than Series II, should I?

I know the exhaust gasket is the same between all S2 & S3 3800s. GM# 24506057

The rear Crank Seals are the same as well. To my knowledge the block & gaskets are all the same between S2 & S3, its working parts that make the difference, crank/rods/pistons, sensors, heads, supercharger/intake manifold, etc... Core block is basically the same I think.
Rear crank oil seal - GM# 12582320
Rear crank cover gasket - GM# 24507388

^ same between 97-08 3800s, I checked.