Since you're 4x4 I'd look at a custom grind like so...

214/214 (268/268) .535-.545 112LSA Very strong low speed torque and would pull to 5800-6000 making power there easily. Have nice idle, decent chop.

Stock exhaust flows great as do the heads so I don't really see a need for a dual pattern cam unless you're trying to gain overlap or something of that nature.