Which cam will work decently with stock magnum tune?

So the 216/224 @.050 comp you have listed is very similar to the cam I ran in my 5.2 dakota. Not trying to be a know it all but I have ran that combination.

I had 3.92 gears hooker super comp long tubes tuned for a 5.2 dakota and weighed 3,650 regular cab 2wd long box. With stock converter it wasn't impressive at all until 2,000 rpm or better then it would come unglued and smoke the tires. But that was a pegleg rear.

With your ram I think probably around 2,500 actual stall and probably 4.56 gears would put it into the low 14's maybe high 13's 1/4. But without converter and gears it will be lethargic. That's assuming you get the computer and or programming to go with it.

My 1/8 times were 8.80 with severe traction problems and 1/4 trap speeds were 106 and bouncing off the 6,000 rpm Rev limiter at the last 75' or so in the 1/4.

I wish you luck no matter