What is customary clearance in '31 Cylinder/pistons

[Gunsmoke]

I purchased a '31 DG8 engine, missing it's pistons (has rods/caps etc). I looked at cylinders, very good order, smooth, no defects. However, they roughly measure 3.05"-3.06". I understand 3" bores were spec for these engines so what I have may have been rebored over-size. Can anyone advise on what I may have? What is normal expected clearance on these engines? Has anyone re-bored these blocks sucessfully to 3.125" bore to take the REPO pistons available from Egge for that bore? I plan to use engine in a '31 Chrysler CD8 Roadster, and those similar blocks had 3", 3.125" and 3.250" bores over the 1.5 years of production.

[Spinneyhill]

60 thou. oversize?

I understand the larger bore Chrysler 8 engines were very similar but had extra stiffening inside the crank case to handle the increase in power and loss of stiffness caused by loss of metal with the larger bore size.