My 340 build

MoparMark91 said

Any idea where i could get those? Cant find em on summit only undersize

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Need your brand and part number to check it out.
But King says this about there chevy bearings.

Notes
These bearings are available in the traditional Std, .010, .020 and .030 specs.

In addition, they are also available in the X.001 and .001

The X001 bearing is used when 0.001" of additional crank clearance is required.

The 001 bearing is used when the clearance is needed to be tightened up by the one additional 0.001" of reduced clearance.

Some parts are not legal for use in California or other states with similar laws/regulations