Magnum 5.2l vs 360 LA?

So, to be clear, in your mind you choose gear and tire size and then match the cam?
No. However, when your presented with a package deal like I was, in this case the free 5.9 I just added part to it. No cam swap. The driveshaft fit a 727 & a 9-1/4 rear. They were a package. I married them.

If I was to a cam swap, I’d have to work within the package of a ‘00, 5.9, 727 w/a 2400 converter & a 9-1/4 w/3.55’s. The tires are 245/60/15’s which worked perfectly with the speedometer gear delivering near dead accurate readings.
What cam would you do? I myself , IDK. Thought about a cam swap, haven’t got there yet. Runs and drivers great for me and what I do with it. Drive drive drive!

In your case when you said what you did above. I just adds two cents. If it doesn’t work for you, sorry. My bad.
You can put any LA style head on the magnum block, use the PRW rockers and a oil through pushrod. Simple, easy, bolt together deal
Also Comp Pro Magnums.