Today, dollar for dollar, is the 318 faster than the 340 ???

What do you get when it’s remanufactured? Is it decked? Line honed? Honed on a new machine wising a profilometer to get the finish correct?
IMHO, a waste of money on a well seasoned block that measures out OK.
But it your money to spend to keep from being called a cheapskate.

Some like Budweiser Beer. I would not use it to wash mud off my boots. Basically "Opinions are like ......" My opinions are not always right but maybe some of yours are not too.