I'd keep the chassis harness, and just change the plugs that won't plug in (dizzy, injectors, evap, IAT, Alternator.)

And then extend any sensors that don't reach (IAT, CLNT).

I dunno, it's not really that hard, it's just a matter of being comfortable with it.

Also with the DX, you may have to go from 3wire IACV to 2wire.

-PHiZ