The GE is all iron just like GTE, with the exception of the having weaker pistons, smaller injesctors, ect. But the block itself should be able to handle just what its big brother can.
The stock 5spd has bad history with horsepower numbers 400+chs68 said:from what everyone is telling me is that u should just stick w/ the 5 speed b/c the 6 speed would require alot of work and $$$ so i would keep the 5 speed
but for the swap i heard that it isnt that hard aslong as u kno what ur doing. but the wiring is hard and a pain.
good luck w/ the project i am thinking of doing the same thing but w/ a 90 supra
http://www.toyotanation.com/forum/t44150.html