Clean the crankshaft with solvent and dry it with compressed air while wearing eye protection. Ensure the oil holes are cleaned with a stiff brush and flushed with solvent. Check the main and connecting rod bearing journals for uneven wear, scoring, pits, and cracks. Rub a penny across each journal several times; if copper rubs off and embeds in the crankshaft, the journals should be reground. Remove all burrs from the crankshaft oil holes with a stone, file, or scraper, ensuring the oil holes are chamfered to prevent gouging or scratching new bearings. Inspect the rest of the crankshaft for cracks and other damage, and have it magnafluxed to reveal hidden cracks. Measure the diameter of the main and connecting rod journals with a micrometer, comparing the results to the specifications, and check for taper and out-of-round conditions by measuring at several points around each journal's circumference. If the crankshaft journals are damaged, tapered, out-of-round, or worn beyond the specified limits, have the crankshaft reground by an automotive machine shop, using the correct size bearing inserts if reconditioned. The crankshaft journals cannot be machined more than 0.010 inch under the standard dimension, and the rear journal on supercharged engines cannot be refinished as it is already 0.010 inch under size. Check the oil seal journals at each end of the crankshaft for wear and damage; if grooves, nicks, or scratches are present, the new seals may leak upon reassembly. An automotive machine shop may repair the journal by pressing on a thin sleeve, but if repair isn't feasible, a new or different crankshaft should be installed. Examine the main and rod bearing inserts for further assessment.