what can i do ?

hi , im from jordan ( king husain ) . i have ae86 levin , it is the only one in my country , under the hood there is 4a-ge , and there is something wrong in it , and i prefer to put on a new engine and more powerfull , so i want to ask which is better to install in the car : 1- 4agze 2- 4age 20v 3-( 3sgte==>the engine that i prefer ) . and here is the price for each engine: 4agze = 1100$ , 4age 20v = 800$ , 3sgte = 1000$-1200$ ( the three engins with wiring and ecu ) .
my ae86 has a LSD and a 4age transmition and other audio nice things .
go to cardomain.com . search toyota 1985 jordan and ( a red levin ) will bee showen to u . she was left in a garage for almost 6 years and then i got it .
sorry for my bad spelling , but im CAUCASIAN yong man living in arabian country and i know english as a second languaj .
thank u ....
SHAMEL TOGHOJ

If you want to stay NA swap in the 20V, if you want boost go with the GZE. The 3sgte is much to heavy and throws the balance of the car off.

i think NA engine isn't good for me , i always think that when u do something do the best u can , and i think i don't like to stay on NA engine , ( i want to hear the sound of the dump valve from my car < tissssssssssssss >) and i drove my friend car ( toyota corolla 1980 4-door with 4agze ) without being scared by the power of z engine , i want to do and have a wild car .
i also thought about Nissan SR20DET and Mitsubishi 4G63 or 4g93 ,
but the two options of NON TOYOTA will bring much work to me .