What Engines will fit in a 1984 Toyota Supra that came with a 5M-GE engine?

I have a 1984 Toyota Supra MKII, and i want to do an engine swap with a newer stronger car so i can find aftermarket parts for it easier, right now it has the stock 5M-GE engine in it.... I was really wondering if an MKIII or MKIV engine will fit... Im open to suggestions, any engine that will fit is a good suggestion to me right now, please help, thanks.What Engines will fit in a 1984 Toyota Supra that came with a 5M-GE engine?simple engine swap.s are 6mge or 7mge or 7mgte which is 3 ltr turbo all will fit in without any mod's the computer will also self learn all the efi system also the later 1jzge will fit or 2jzge or the big mother 2jzgte but not without a lot of work fitting and you will require a later computer all cost $ in time and money it just comes back to how much money you are willing to spend