These low-friction, roller camshaft bearings only require oil "splash" lubrication. Oil feed holes can be totally blocked off, to reduce oil aeration and windage losses. Engine block must be machined to accept bearing size shown in chart.
The 351 cam journals are NOT production dimensions. The 429-460 dimensions are production. These roller bearings require an SAE 8620 steel camshaft.
2.500" OD and 2.125" ID. 0.625" length.
Not legal for sale or use on pollution-controlled motor vehicles.