What you really don't need on a turbo engine is a set of wild cams. You've already got something that's increasing the VE stuck on the end of the headers. Wild NA focused cams will sap power out of your package.
You can play around with cam timing a lot more than you used to, because turbos aren't **** like they used to be. You don't need as much exhaust energy stacked up behind the turbine wheel because modern turbos are low inertia and spool up faster. So, hence, you can open the exhaust valve duration up, the way you would on a NA engine, for example.
Basically, you can run relatively low lift and duration package cams, which is easier on the engine and, still make mega power because of forced induction.
...and btw, the rotating assembly in your 4.6 isn't going to take much above 450 before it blows....any turbo setup is going to incinerate the rotating bits pdq.
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto N/A tune. 100 shot nitrous on BBR tune. Best e/t 11.38 at 120.85
2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP