I dont have a SYTY but I am putting together an AWD Blazer. It will have a 400 small block with tons of low end torque. I have a 700-r4 that is rebuilt, I am trying to decide on a converter (stall speed). I want to keep the lock up feature. I have 3.42 axle gears and I am not sure on tire size yet. Any help or if you can point me in the direction of an expert would be greatly appreciated. Thank you.