I have a 700r4 trans with 4.11 in the rear. I guess I will go with a 3500 stall. I talked with chad speier the other week about some profilers. For $1600 I can get his 210's with the econo port job. Should put me in the 550 hp range. With a out of the box intake according to him. I also spoke with someone over at profiler and can pick up a set of 210's out of the box loaded with 2.05 valves for $1050. Should support around 450 hp out the box.