--Optional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversizedOptional, SOME aftermarket crankshafts and/or GM CRATE engines where the pilot bearing bore is oversized