Only 460hp

Any ideas on how much more cam I may need? Specs?
For what you're doing with a 3.55 gear I'd keep it in the 250-255° @ .050 and .575ish lift.
I've done that. The problem is using flat tops with the Trick Flow's 60cc chamber. Compression is pretty high. I already have a hypereutectic dish piston already. It has a step on it so they have to be replaced to use closed chamber heads. Looks like I may "have" to go with a dish to get the compression reasonable with pump gas.
Can step be milled off? I'm not familiar with that piston.

Like I've said before, I'd drive it as is and see how it felt. If you want to step up the power later start collecting parts and have everything ready when you get ready to make the change. There will be a high cost to pick up the little power you're wanting.