The BA's with Brembo's have 4 pot front,a nd 4 pot rear calipers, the BFs with standard Brembo's have 4 pot front, single pot rear as far as I remember, if you got the premium brakes you got the bigger rear calipers. If we are talking the Manual Trans equipped versions there isnt much difference mechanicly, if we talk manual vs ZF auto then there is a little bit different to help with the change to auto with the different trans cooling, ratios etc etc. Since you want a BA you'd be stuck with the T56, but if you go BF illd go with the auto, they are a fantastic gearbox, silky smooth and reliable. Having said that the manual box in the FG's is pretty much the same as in a Dodge Viper!