Changing rod bearings

Welcome to 2CarPros.

If you replace them, you really need to mic the crank to determine if there is excessive wear. If the crank is worn, new bearings really won't help. Here are the specs for the crankshaft. If you need help, let me know.

CRANKSHAFT DIMENSIONS
Engine Liter/CID. 5.7L/V8-350

All specifications given in inches.

Crankshaft Journals
Main Bearing Journal Diameter. [06]
Connecting Rod Journal Diameter. 2.0986-2.0998
Maximum Out Of Round All. 0.0010
Runout Service Limit. [02]
Bearing Clearance
Main Bearings. [07]
Connecting Rod Bearings. 0.0013-0.0035
Thrust Bearing. 0.0020-0.0060
Connecting Rods
Pin Clearance [12]. 0.0008-0.0016
Side Clearance. 0.0060-0.0140

[02]If main journals are misaligned, crankshaft is bent & must be replaced.
[06]Front No. 1 journal, 2.4484-2.4493 inches; Nos. 2, 3, & 4 journals, 2.4481-2.4490 inches; No. 5 journal, 2.4479-2.4488 inches.
[07]Production: Front, 0.0008-0.0020 inch; intermediate, 0.0011-0.0023 inch; rear, 0.0017-0.0032 inch. Service: Front, 0.0010-0.0015 inch; intermediate, 0.0010-0.0025 inch; rear, 0.0025-0.0035 inch.
[12]Interference fit.

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By checking the crankshaft, you will be able to determine if standard bearing will work or not.

Take care,
Joe