Yep sounds like 3:21 gears.
I just looked at your signature line and see you have an Eddy cam in it. Which Eddy cam is it? The performer or performer RPM? Did you degree it in when you installed it?
If it were me I'd try the bigger stall converter first before going lower on the gears. Your stock converter only stalls about 1500 rpm so even if you went with a conservative 2500 stall you'd gain alot. What size rear tires are you running?