.0015 is on the tight side but IMO not enough to cause a bearing to spin by itself. Not sure what oil grade you were using but with clearances that tight I'd have been using 5w30. In general, the tighter the bearing the thinner the oil should be . . .
E85 racer and E85 carb builder
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68 Camaro, E85 powered 427" small block. 9.96 @ 133 MPH, 1.319 sixty foot on motor. 5.92 eighth @ 116 with a 1.42 sixty breaking beams with back tire on the bottle