If you're committed fully to an Naturally Aspirated build, and are fiscally secure enough to make the investment...then I'd go ahead and do with the CTR cams. Ultimately, you'll want to upgrade to a stronger clutch and lighter flywheel, perhaps in conjuction with an increase in compression. But in the interim, the CTR cams, cam gears & Intake Manifold should get you knocking on the door of the 13s.

My only concern is loss in mid -range torque with the Skunk2 Manifold..since it emulates the ITR manifold. Also, is your FPR set at stock pressure? Given your current setup...I wonder if it's truly necessary?

Also, I'd usually move this off to our Hybrid Forum...but I'll let it linger here for a bit. h:
You may want to give the Hybrid Forum a look-over.