Civic Si Harness compared to Crx

Ok, so I have a 91' Crx DX with a B16 swap. When it was swapped the A/c was removed and the wiring mysteriously dissapeared for the entire system, also the wiring was mangled and appears to have been done by a 2 year old... I have found a 90' civic Si in a junkyard with all of the a/c wiring intact. My question is this. Is there a difference between the civic and crx wiring harnesses? I know that the civic has manual A/C controls and the crx has electronic, are the plugs the same, is the wiring the same? Can I convert it over to work? I know that the Si has a sunroof etc, I wouldnt be using those. And no, I am not asking about the DPfi to MPFI swap, I am asking about the main wiring harness. The one that contains all of the wiring for the lights and A/C, the seatbelts and all that good stuff. Could I take it out of the civic and install in my crx, I am not opposed to running an extra wire or two, or even changing the pins to match. But I cant seem to find any info on the differences and Id like to get as much info as possible before I spend my time tearing apart a car and then paying for it...

if you use the si interior harness you'll also have to use the si engine harness, which will pretty much exlimnate the need for the mpfi conversion and shitty wiring. the only thing im not sure that would work is the climate control since the crx is push button and the civic is wires and levers.

Right, I would like to just use the Si engine harness as well. But the control is the only thing puzzling me right now, those damn mechanical controls are dumb.