I won’t argue that, but, there is undeniable truth in a bigger bore being better. If you can do it, then do it. If I was getting a 318 race ready kind of build, I’d look for a block that can easily go .090 or .100 over for that 4.00 bore.... or better... is it needed? No. Is there an edge with it? Hell ya! Now the question is, what will you leave on the table? We all leave something. It the less you leave the better you’ll be.