Hi , I need a new transmission for my ba. I have been searching the web for a week and found 2 options I like. Having been a manual guy, I have no experience with stall etc so would like some first hand info. The first option as a t700 ls box that can be adapted and converted to full manual and 800hp capable but about $5500 delivered. I'm not sure they are as proven as the old c4 but they are 4 speed and have lock up converters. The c4 is proven at 1000hp at price of $3550 with converter. Full manual. The c4 seems a much better deal to me but I don't know how much better fuel consumption I would get with the 700. I have talked to the c4 builder and he recomends 2600 rpm stall as I tow with this car and he says with a big cooler it will be fine, I would like opinions and experiences with towing with a higher stall. Car will be starting at 600hp atw but don't know where it will end , so looking at a tough box.