Just remember...3000 isn't very much. A decent converter (even off the shelf) should be 3800 and 4000 wouldn't hurt...if you can keep the slippage down.
I've seen more ET loss from a tight converter than most anything else.
well, on street tires and stock suspension, slapper bars, hooking up can become a challenge. I would guess my stock converter to be 2000 rpms. A 1000 rpm jump would be big to my car.
