Since your assembled, easy solution isn't so easy. That one is big, I might re-set your gauge and just measure them all again. If consistent, then you really have 3 choices. 1. Measure your lifters and see if you "get lucky" and have 1 big one. It does happen. If your using high end lifters, like Jesel, they will make you an oversize one or a pair. Mass produced ones like Morel, I doubt it. 2. disassemble and drive the bushing out and put a new one in. 3. Run it and don't worry about it. It's not ideal and you will have some leakage. But I doubt it will be the cause of a failure on it's own. My guess, looking at your measurements, is the bushings were not honed to size. I bet they were just reamed and possibly a ball hone run through them for a finish. A flat stone rigid hone is really the only way to get really straight, consistent size on the bushings. Iron blocks especially, push the bushings all over the place when you drive them in. Aluminum blocks are a little easier. How do they look for out of round and taper?
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