I pick my 700r4 up tomorrow and I'm going to be replacing the toque convertor as well. Now comes the questions I was asked. Do you want a 10, 11 or 12 " and what stall? Uh beats me. I have a SB 350 .030 over RV cam headers, 4 bbl may be around 300 HP with a 700r4 and 3.73 rear truck weighs in just under 3200 lbs.. I have been reading all night and it's all so confusing. Stay with the stock convertor thats less efficient or a 2200 - 2800 stall 10 " smaller convertor less heat? I'm getting cross eyed. Any tried and true suggestions? Useage wise cruising around & highway travel maybe a little tire bark now and then. Any advice appreciated.