You can do 2 836 bore-jobs for the price of the nikasil, I gotta ask why?
other than the fact that the 1000cc, may be bigger than you desire, I would be looking at the bollet MReick block.. sounds more reasonable..plus he should be able to make an 836cc.
I am thinking the onepiece + plated alum block, saves a bit of weight, improves heat transfer (more needed on big bores), and is more oiltight.