I doubt that that cam, stock heads and a carb will make 360. I would guess more like breaking 300.
Your question, can you get 360hp with factory injection, yes you can. If you want an idea of what it would take: heads, cam, TB, good exhaust, injectors and pcm flash.
Considering the torque these Magnums make,(360 with factory F.I. ,and what has been seen done) H.P.,is the selling point,that torque curve is just nasty. I basically cloned the 380 short block,added the basic E.Q.heads... It's carbed,for now...Throttle response is crazy..
Both of these. I don't think they're in disagreement. All of your aftermarket replacement heads flow better than stock. I wouldn't think the cam and intake would improve to 360 on their own.