1983 Toyota AE86 motor swap

[ZenkiAE86]

Hey im kinda new to this so ill just jump in, XD

I have an AE86 with a 4-AgeC just got it havent had a chance to play with the motor yet hoping its still good, but things aren't looking to good for it and i was wanting to get some ideas for Toyota engine swaps that will get me loads of power but not mess with my balance or effect the over all GVW very much.I am not limited to 4 cylinders ive been looking around at stuff like 7MGTE, 2JZGE,3SGTE, or even 5VZFE. its kinda driving me crazy i mean theres so many choses but i dont wana looses the feal of the AE86 just more power and High Revs, Thanks for any input.