I would sleeve to 85mm. This will still allow adequate cooling. For turbo, you could go with either the B17 or the B18 crank, since high redline isn't as much of a concern. However, the B18A/B crank may cause a rod ratio alittle on the short side since the deck height of the B16A isn't as tall. I, too, like the Eagle rods, and I personally prefer the Arias pistons. A B16A head is just as good as the others and can generally be found for cheaper. Use the money you save on it for a good port and polish job. Springs and retainers are really optional, but recommended, since high revs aren't as much of a concern.
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