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Unlike the typical small- or big-block Chevy, not all Olds 455 cranks were machined for a pilot bearing from the factory, which was the case with our 461. It's best to drill out the crank before the motor is assembled, but we hadn't decided on whether to run an automatic or a five-speed at that time. The solution was to enlarge the back of the crank 3/32 inch by hand, install a support bushing, and then tap the bearing into place. View Related Article
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