turning a 360 crank and putting it into a 340 will give you the ability to use a substantially larger bore than you could with a 360. I have seen build with a 4.080 bore 340, but a 4.040 is about the most you want to push a 360 for street strip duty. The difference is about 12-14 cubic inches, my friend. There is no replacement for displacement, that's what my psychologist told me...LOL The reason you use 360 pistons off the shelf is the difference in compression height, or how close the pin is to the face of the piston. Off the shelf pistons are cheaper than stroker pistons. Right? 360 stroke, 3.58, 360 piston like KB's at an .060-.080 overbore, and you got a 372+ for less $$!!But you can't get a 360 block that will safely take an overbore of .080. Make sense? Thus, 340 block, $400, craigslist. Over all, still cheaper than a 408. Just my humble opinion, 340mopar, but it bears investigation. An extra 200 bucks for 12 more cubic inches? I think that's a good deal, myself.
