The .020 means the main bearing journals are reground to .020" under standard size. Since a 216 and a 235 have the same size main bearings and each main is a different size, here are the specifications for a standard diameter and a reground shaft:

Std.

#1 2.6835-2.6845"
#2 2.7145-2.7155"
#3 2.7455-2.7465"
#4 2.7765-2.7775"



-.020"

#1 2.6635-2.6645"
#2 2.6945-2.6955"
#3 2.7255-2.7265"
#4 2.7565-2.7575"

The factory shim pack part number for 216 and 235 main bearings is a Federal-Mogul part number FSM-104S. For Babbit connecting rods they list a shim set part number of FSM-105S.

Jerry


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