What are you looking for Trei? Out of the hole acceleration or is this in your buggy?
Generally speaking, unless you have a radical cam, are looking for launching out of the hole and you are wanting decent off road capabilities with generating less heat then stock to 2200 rpm (check your cam specs with a good trans shop for a recommendation).
Had a friend at the last official RdUp just go back to appr a 2K stall after trying a much higher stall in his 427 with 4r70. He tried but couldn't like the higher stall.
You can usually count on less heat generated with a lower stall also in case that's a factor.