Re-gearing will help as well.
A lot of popular mods for the magnum are roller rockers , cam, upgraded intAke manifold, new heads, ect.ect.
New throttle body from the fastman comes to mind as well
You could also move the iat to the intake tube and plug the iat hole in the intake with a 1/4" npt plug
And the basics like copper core plugs, (platniums won't work) Cap and rotor with brass contacts, 8mm plug wires.
There is also a Cam position sensor mod that will let you advance or retard the timing
Also make sure your intake plenum isn't leaking. This can cause major power loss.
(I keep adding to this post as things come to mind. I've had 3 magnum engines, 96 ram 360, 99 durango 318, and an 02 ram 360. Great motors!)
I've also heard you can take a 318 cam and drop it in a 360 , as the 318 cams are a bit more aggressive
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