the 400 is by far the best. The 383 is a waste of time and money to build. 413 is not as plentiful as the 400 is and has some pecuaiar traits in the valvetrain. $00 block is stronger and is more often built. The 400 is ok too. Better to get the early 440 but the newer ones can still go to a .040 or .060 bore. I gues you know there is a difference in deck ht with the B and the RB blocks.
Ed