POLL: 360 magnum or 3.58 stroke 340?

Wondering what everyones thoughts are? I have a stock bored 340 that I was planning on 3.58 stroking, since I already havea 360 crank/rods etc...
Now the quandry comes in to where I just got a complete 99, 5.9l magnum for really dirt cheap from a buddy of mine, with 100,000 ish miles on it. I can get a new cam for magnum, ring/bearing it etc... and probabally make same or more HP than the 340. I already have a LA 360 in the 69 Dart now, that runs great. I just wanted to do another motor for the car and make a little more power.
What engine would you build?