OK, it's .020" undersize, and worn. You either need to have it reground to .030 under and change to the corresponding main bearings, or find another crankshaft that is in better shape. Next question- - - -what size are the rod bearing journals? Since you're dealing with a splash-oiler engine you'll need to find a crankshaft that matches your rod diameter, or swap all six rods to match a replacement crankshaft.

I have a huge supply of reconditioned Babbit rods, and the machining project I'm working on can use worn-out ones easily. I hate to trash good rods. PM me and we might be able to work out a swap.

There is a big salvage yard in Albert Lea Minn. that auctions crankshafts on Ebay all the time, including splash-oiler Chevy 216 and 235 shafts. Search Ebay for "216 Chevy crankshaft" and I'm sure you'll find them.
Jerry


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