Your stall converter will not affect anything other than the stall point under load, like against the brake for launch. So the question is, how much "launch" do you want to give up for cruise economy and reduced wear & tear on the engine on the road? Tech gave you the whole range of gear ratios, and you can simply proportion from the values I gave you to get different cruise rpm's - like 2.73/2130rpm = 3.55/X and solve for X ((3.55x2130)/2.73 = 2770 rpm for 3.55's). You also need to consider how radical that cam is, like Tech pointed out.