Without wading into the while discussion, I'll fall back on my standard 'complaint' when it comes to machine work. It's not a 'given' that taking the block in to get it line honed is a good idea. It might be, or it might not.
It's kinda like bringing in a bunch of snakes to eat the mice....the mice are gone but now you have a snake problem.
I always get a bit freaky when it comes to changing the crank-cam distance. I also am not that wild about re-machining a 2.5000" hole to 2.5000". It's all compromises.....proceed with caution.