the b20s are rad.. you cant run either intake mani, so dont worry about which one it comes with.
PERSONALLY, i dont recommend using a B16 tranny unless you plan on cracking the case and popping in an LS or GSR 5th gear.. a b20 at 80 mph with a b16 tranny is gonna be rough on the motor and on your ears and pocket. try a GSR instead..
dat right im a fan of the gsr gives best of both worlds.