340 cam specs?
I like the 360 because each piston has enough swept area,~737cc, and enough piston selections, that you can pretty much achieve any Scr goal you need. 340s are 696, still doable. But by 318 and 658cc you gotta pay attention to parts selection and machinings; but it's getting better with some of te new heads,etc..
As for strokers; a 408 is 823.7cc so now the scales is tipping the other way, and you need dished pistons, so you are again paying a lot of attention to chamber sizes and machinings.
The 360s just seem to fall together fairly close to perfect.