I've done that exact conversion.
If you've got a 5-speed out of a KP then its' easy as.
Everything bolts up to what you've got, although my 4k dizzy was electronic and not working so I just swapped in the 2k dizzy and it ran mint. Intake and exhaust manifolds bolt up no worries, as do the engine mounts. I had to use my 2k fuel pump in the 4k as the one that it came with was shagged.
The 5speed gearboxes out of the DXs are slightly longer, they bolt up to the engine and mounts fine, but the shifter is further back so you've got to grind a little bit of the trans tunnel away to get it to fit nicely. No biggie.
Having a 4k makes a huge difference.. best $80 I ever spent, lol!
4AGE.. big, difficult and considerably pricey job, parts are getting very hard to come by now. You need to wire up the car to suit injection, new fuel lines, mod engine mounts, so already a much harder job than a 4K. And its' definitely a stick it in the garage for weeks job, whereas you can easily do the 4k swap in an afternoon.

Daily driver: Toyota RunX/Toyota Caldina
Ex: 2x AE101, 5x KP60, KP61, EP71, 3x KE70, KE72, AE70, AE82, 2x TE71, AE90, AE92, ST170, plus 11 Hondas, 12 Nissans, 6 Fords, 4 Mazdas, 3 Mitsis, an Isuzu and a Lada!
