Opinions on Blueprint Crate R/B 493/440

Thanks everyone My issue is that I don't have the specs on the original motor so I don't know what the actual bore is. I'm afraid that if it gets sent to a machine shop there might not be enough room left to rebuild/bore it out further Then I wasted $2,000 or more and have to go from scratch anyway. I'm really stuck with this decision and me not being a mechanic I'm at a loss to do anything myself.