custom grind cam selection
The main benefit to the aftermarket as cast castings is increased P to V, more room for milling and not to mention the benefits of an aftermarket casting versus a stock casting in terms of performance and strength. In your application, strength of the stock casting isn't an issue, but performance certainly is!
If you look in my "New Cams from Tick Performance" thread there are many members making 420-450rwhp/390-420rwtq cam only with our SNS Stage 3 camshaft which is slightly smaller than the Polluter camshaft.
You can expect similar results cam-only with the Polluter cam. With CNC ported heads, both of the 2 cams mentioned should make 450-480rwhp and in an optimized set-up 500rwhp can be achieved.


