As I just wrote back in your PM, the cam caps are line bored with the head. Each head-cap combination is not interchangeable. Many people do but shouldn't, this is why Honda doesn't sell the parts seperately. The tollerances can't be adjusted since there's no bearings so the caps can't be interchangable.

Think about drilling a 1.5 inch hole in plywood and then cutting that piece into two half moons. Now do the same thing once more on a new sheet of plywood. You will be left with 4 half moons but would you trust to interchange the sets and end up with a perfect circle? It's the same principal.

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