cam choice for a fuel injected 340/416

jbc426 that thing is sweet sounds great too thats what i want . what does it idle at and what exhaust r you using is it a magnum motor or la ? my current combo is not together yet .this is what i have 340 30 over with a scatt forged 4'' crank and icon pistons scat i beams rods and a set of pro comp heads cncd la pattern i was going to put this in my duster but i sold the car and found a dakota r/t that i want to put it in the guys at dakotart are not as helpful as the abody guys .im trying to blend la and magnum stuff going opposite magnum to la . as for tire size 255/55/17 392 rear gear i think and stock overdrive tranny 46re? so please fire away with combos and thoughts thanks