info on the 4a-gze???, little help.. Options

[x_itchy_b_x]

Ok, heres the deal. First of all i wanted to swap a 3S-GTE into my 96 st, but i would have to modify mounts and use a different transmission right? correct me plz. So the 4A-GZE would be the perfect alternative right? 170hp is what i hear from other topics (i did do a search before i wrote this) just some things were unclear. So, my dad sez he can probly get a hold of one from a friend who owns a junkyard. So maybe getting a new motor isn't a dream any more we will see. Oh and i plan on buying the whole clip.
ok so heres my questions:

• What model/year use a 4A-GZE?
  
• Would i have to get a new transmission?
  
• This is probly a stupid question but could i use my 7A-FE's ECU?
  
• If i needed a new transmission what model/year would i be able to use?
  
• Would i need any type of new suspension?
  
• Would i have to get a new large fuel pressure reulator?
  

Thanks for your help. Any info on this swap is very much appreciated.