It begins again - 512 Stroker

Imo, if you’re planning on putting any real mileage on the motor, especially with a cam that requires higher spring loads than the OE springs..... just put the hardened exhaust seats in now.
There are no factory Mopar iron heads immune to exhaust seat recession.

My other advice is...... since you won’t have any quench....... be conservative with the CR.

Oh, and I don’t think there’s any danger of making 600hp with a 512 using template ported stock heads with a 509 cam.

Well.......it wouldn’t make that here anyway.