I've only done a Super-A, but I believe the process is universal- To answer the first four, my machinist had all the info he needed. It will be interesting to read of other's experiences. Have him 'magnaflux' the crank also- mine was found to have a crack when magnafluxed, and I was glad it was found then, rather than when it cannonaded my engine. He should be able to tell you if it needs grinding, and he should be able to supply you the bearings for your mains and rods, but moreover, I think that is standard practice. He will take off only enough to make the journals perfectly round, and should be able to tell you if it is beyond regrinding. You can probably get an idea of where you stand by looking at the old main bearings. Mine were stamped with, among other things, the letters "STD", (for 'standard'), which meant that they were original-sized bearings, and in a case like that, you can feel assured that your crank could be successfully ground. There are a couple of sizes under this that it could still be ground. Consider, in the process, to having your connecting rods 're-conditioned', a process where the machinist resurfaces the mating surfaces, then torques the rod and cap together and rebores it to size. It'll be one more thing to feel reassured about.
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