[SWB 89 VIT]

hi there guys and girls just joined the first of all hi!!

now I thinking of putting a g16b into my 89 vitara I want to know everything, is it hard? is there much to it? how much modification is there a lot or a little ?
can I use the gearbox I got (5 spd manual gear box for g16a) and running gear?
is it cost effective?

or am I better off rebuilding the the g16a?
let me know please
cheers