700hp from a 2v? i think not. best bet it to get a cobra dropout, put much better internals in it, boost it, buy tko, rape shit.
in all seriousness, like tyler said, anything around/over 300ft lbs of torque is going to eat those trannies up. 3 t-45s in one summer and i was only at 298ft lbs of tq.
you might be ok with a t-56, but im not garaunteeing anything.
some common bolt ons include, gears, intake, chipped, underdrive pullies, larger throttlebody. unless you go boost, your going to be limited at around 260 wheel.