any advantage to a 5.2 over a 5.9 ?

you can easily get 325 HP from it.

Can you define "easily" ?

Was planning on just pulling off the fuel injection stuff and replace is with and RPM Airgap, and my current Edelbrock 600cfm carb, maybe headers in place of my early 340 manifolds.
Where do you think that would get me?

And what do you think it would take to get to the 325 number?