Help me out here, just a little bit.
 

I have an S13. Blown KA24DE. Getting an S14 KA24DE..

What all do I have to swap over to make it work in my S13?

give me a descriptive list, PLEASE.

trust me... its all you need because i used the same info back in 05

https://www.s-chassis.com/forums/how-tos-installations-48/ka24e-ka24de-swap-40949/

thats for a kae not kade.

uhm................. it all applies... and that is for a kae to ka24de

AFAIK, the only differences between the S13 KA and S14 KA is

- OBDI vs OBDII (more emissions)
- ECU (fuel maps are different)
- Internals (S13 240/248 cams ~ S14 232/232 cams
- SCV butterflies in S13 and not in S14
- No AIV PAIRS from 1994 and later

I'm sure there are other little things that differ between the two.

I don't know how different the body harness is from 13 to 14, but as long as you can get the ignition/starter/fuel pump wires spliced or plugged correctly, you should be good to go.

^^ +1

nick you basically need everything from a obd1 s13 that is already listed in the list of "things needed" it doesn't get any easier bro.. im sorry.

So im going to need an S14 ECU?

1991-1993 parts:
-Wiring harness (tach if you want the tach to work)
-ECU
-Power steering pump AND lines.
-A/C compressor and lines. (unless you can make a bracket for your original one.
-Distributor and coil
-Intake manifold
-Throttle cable/cruise cable(if you like things all nice and neat)
-Extension Piece that goes from butterfly to intake piping(again, if you like it nice and neat)
-MAF

I cant use my current wiring harness or tach?

yes if its obd1 which yours is.... all you are doing is swapping all the s14 stuff off, however, if its a manifold without the secondary swirl valves... keep it and just swap the electronics and TB from your obd1 manifold to it. Nice little free mod.