What year 360?

3418496 is THE stock 360 block of choice, but beware, the main bearing design changed across the board in 1974 on all Mopar blocks.
This is the primary reason why some books differentiate '74 from '73 and prior, even though a '74 360 is the same casting number as it's predecessors.

The early 360s ('496 casting) used 340 casting cores and were bored .040 less, which is why they are purported to be thicker.

In actuality, a 340 is considered a "light" casting capable of safely sustaining a .040 overbore.
One can assume that a 360 will bore .080 over, possibly more, but I've seen things to the contrary, both positive and negative.

It's always wise to sonic test it before boring the crap out of it.

Mark.