With an 11" try this.
http://www.competitionproducts.com/p...umber=12-771-8
With a 10" 3500 to 4000 stall this one will scare you.
http://www.competitionproducts.com/p...umber=12-900-9
I wouldn't worry about that much stall on a limited street engine, make sure your valve springs will handle the lift.