Hey FABO, If anyone is interested... I had the machinist at my work turn down the pilot bearing, that would normally go into a small or big block crank shaft, to fit the smaller 273 journal. Size is 1.556" It tapped in with a socket over the face of the bearing. It is nice and snug. We weren't sure what we'd find once he started taking material away, but it turns out to just be a solid race around the needle bearings. At least, it is solid up to the 1.556" point.