That cam sounds fine for the future if you use 1.60 or more rocker ratio when you upgrade the heads.
0.706 on 1.5 rockers would be 0.777" gross lift with 1.65 rockers and around 0.750" after subtracting lash.
It is similar to the cam I ran in my 540 CID with Indy 440-1 CNC-345 and T&D 1.65 rockers. That combo was a copy of a 860 hp setup.
Indy site says their CNC porting flows 380 cfm. Guy I copied said It made power to 7400 rpm but he shifted it at 7200. Mine was still pulling strong when I shifted at 7300.
So 528-540 CID is enough to meet your power goal (with better heads, IMO)

But if you build 572, you might go to Indy CNC 572-13 heads, or even B1 heads.

What was the RPM for peak HP of your current setup?
As Fast68 said, your SR heads will lower the peak HP and RPM if you build 572 CID.